Saw this on another site guy says its good but I don't know. LP amps NIB. What a pile of stuff! Is in German.
http://www.pimpmysound.com/advanced_search_result.php?XTCsid=&keywords="Linear+Power"
http://www.pimpmysound.com/advanced_search_result.php?XTCsid=&keywords="Linear+Power"
I wouldn't consider myself a "Linear Power People", but wow, what a pile of NIB old stuff. I'd like to have just one for the collection...
Looks like they might be able to give tomtomjr a run for the money...
Looks like they might be able to give tomtomjr a run for the money...
I only have a few Linear amps. Maybe 10 total... But, I sure would like to snag a bunch of these. Still thinking about it.
Sorry some people are pretty weird about them. I never saw them as super special when I put them in new, a good amp yes but mighty expensive and sometimes other amps worked better on highs. They do have some power for what they are rated at, compared to other amps of the day....and today. I have two 1002 right now think I will sell them to a friend after I try one just for fun, don't think they are large enough for what I want. Then again the pair might do better than the 4x85 I have in there now I better try it.😉
jol50 said:
Watch Ray have a whole slew of NIB Linear Power amps for sale in the up and coming weeks 😀
Hi,
I used to do warranty service on Linear Power. They did deliver the power and worked off of some pretty high rails. Too bad they didn't sound as clean as they could have.
I wouldn't mind reusing the toroid for a build. That and maybe the case work. The rest isn't worth keeping. The amplifier output transistors were those horrible MJ15015 and MJ15016 types. When repairing one, I use MJ15022 and MJ15023 types. The newer On Semi ones might work out better too.
Anyway, they had a great power supply for use with a home amp type circuit. I think the medium power models ran at around +/- 45 VDC! With that you could build on heck of a great sounding amplifier. With a new build, you could also install a shield between the power supply and audio circuits.
Why do I mention this? Not too many amps ran higher supply voltages. I gave away a couple older MGT 2100s and miss them. Those were another great candidate for a new build. They already used what was really a home amp circuit in the car. For the time, they sounded better than anything else out there. +/- 33 VDC rails.
-Chris
I used to do warranty service on Linear Power. They did deliver the power and worked off of some pretty high rails. Too bad they didn't sound as clean as they could have.
I wouldn't mind reusing the toroid for a build. That and maybe the case work. The rest isn't worth keeping. The amplifier output transistors were those horrible MJ15015 and MJ15016 types. When repairing one, I use MJ15022 and MJ15023 types. The newer On Semi ones might work out better too.
Anyway, they had a great power supply for use with a home amp type circuit. I think the medium power models ran at around +/- 45 VDC! With that you could build on heck of a great sounding amplifier. With a new build, you could also install a shield between the power supply and audio circuits.
Why do I mention this? Not too many amps ran higher supply voltages. I gave away a couple older MGT 2100s and miss them. Those were another great candidate for a new build. They already used what was really a home amp circuit in the car. For the time, they sounded better than anything else out there. +/- 33 VDC rails.
-Chris
Compared to a Rockford Fosgate Power 351S, I prefer the sound my Linear Power 1502IQ delivered to my mids and highs. Three different people could tell there was a difference between the Linear Power and Rockford Fosgate. The fosgate seemed to add some tone to the highs making the mid-range sound more dull and lifeless.
When performing the test, I also tried a Soundstream Reference 700S on my mids and highs. It was pretty much a toss up between the Soundstream and the Linear Power with regards to quality on the mids/highs.
When performing the test, I also tried a Soundstream Reference 700S on my mids and highs. It was pretty much a toss up between the Soundstream and the Linear Power with regards to quality on the mids/highs.
0ldsch00l:
Same experience here. I had a Zapco Z220, LP 2002, and a Soundstream D200II. I loaned them -one at a time- to a friend who was taking Dr Leach's audio classes at GA Tech. Powering a pair of well-filtered Pioneer C16xxxx's with Vifa 27mm domes, and alternately a pair of (IIRC) Audio Concepts AC-12's with a Leach "Q-correction" circuit (similar to the Linkwitz transform). He's a smart guy with a good ear for sound who's still doing DIY home audio some 15yrs later.
The system sounded very good, though the pioneers required serious notch filters.
End result:
The LP was a better midbass performer, but otherwise was pretty much a toss up. My affinity for Zapco products led me to keep the Z220 and trade the others off.
Same experience here. I had a Zapco Z220, LP 2002, and a Soundstream D200II. I loaned them -one at a time- to a friend who was taking Dr Leach's audio classes at GA Tech. Powering a pair of well-filtered Pioneer C16xxxx's with Vifa 27mm domes, and alternately a pair of (IIRC) Audio Concepts AC-12's with a Leach "Q-correction" circuit (similar to the Linkwitz transform). He's a smart guy with a good ear for sound who's still doing DIY home audio some 15yrs later.
The system sounded very good, though the pioneers required serious notch filters.
End result:
The LP was a better midbass performer, but otherwise was pretty much a toss up. My affinity for Zapco products led me to keep the Z220 and trade the others off.
Yeah good old Ray, I have to send something to him too.🙄
When I was installing LP new we ran SS amp on highs for high end systems. They were cleaner and brighter sounding. You could take a 2002 and a SS that size and everything above the mid sounded better on the SS, but the LP would go louder with more bass and slightly warmer sounding. SS was sort of cold sounding, but that was fine on highs. We used mostly LP and some RF on near anything high powered. Also sold pioneer and kenwood, they could not keep up in the power wars. Some of the larger kenwood worked well though for mid size amps...and the other day I had a new-ish silver and an old black kenwood, the output sections were about identical. They don't look that impressive inside either but they work...and run hot.
Thanks for the informative posts guys.
Wow $500 for a 5002! 250304722853
When I was installing LP new we ran SS amp on highs for high end systems. They were cleaner and brighter sounding. You could take a 2002 and a SS that size and everything above the mid sounded better on the SS, but the LP would go louder with more bass and slightly warmer sounding. SS was sort of cold sounding, but that was fine on highs. We used mostly LP and some RF on near anything high powered. Also sold pioneer and kenwood, they could not keep up in the power wars. Some of the larger kenwood worked well though for mid size amps...and the other day I had a new-ish silver and an old black kenwood, the output sections were about identical. They don't look that impressive inside either but they work...and run hot.
Thanks for the informative posts guys.
Wow $500 for a 5002! 250304722853
'sup jol50!
I am the winner of that amp.
I've wanted one for some time. I've watched for almost a year, and 5002s tend to go for about that much on Ebay (plus or minus a few $).
It will be cleaned, some basic tests run to determine its level of health, and used in my home studio on the monitors. I doubt I will ever put it in a vehicle.
I tend to agree with the comments on LP sound. They are warm, with a phat bass, and slightly softer highs. This suits my monitors well since the tweeters have a little too much zap.
You can also drive the snot out of a LP and they don't get too hot (barely above warm in my experience). As long as you don't mismatch the impedence... 🙄
I am the winner of that amp.
I've wanted one for some time. I've watched for almost a year, and 5002s tend to go for about that much on Ebay (plus or minus a few $).
It will be cleaned, some basic tests run to determine its level of health, and used in my home studio on the monitors. I doubt I will ever put it in a vehicle.
I tend to agree with the comments on LP sound. They are warm, with a phat bass, and slightly softer highs. This suits my monitors well since the tweeters have a little too much zap.
You can also drive the snot out of a LP and they don't get too hot (barely above warm in my experience). As long as you don't mismatch the impedence... 🙄
5002 is quite an amp, that one looks pretty good for age good luck with it. And they have piles of power no doubt about that. You bought it, small world!
Not to change subject but I never seen an alpine like this...likely from same era and not cheap for an alpine. 200261686483 Maybe that is old F1 or something?
Not to change subject but I never seen an alpine like this...likely from same era and not cheap for an alpine. 200261686483 Maybe that is old F1 or something?
Nope, just plain "old".
Mid 1980's and huge. Honest power, but nothing remarkable. Hopefully, it had sentimental value for someone.
But that enourmous heatsink could be useful for something else!
I like old alpines, I think they sound nice for some reason. Issues I find are most don't make a lot of power, they run hot, and some don't like to run low loads. Maybe why only a few of the late and largest 35xx are worth money. I have run the snot out of a 3522 2x40rms, I bought a second one for <$5. I'll try to bridge them if I ever get back to that project.
I've seen a lot of alpines, never seen one like that it must have been special in some way. But yes 2x50 is not much, I just can't get excited about small amps with large prices. In fact I paid less for a LP 1002 I have and more for another NIB LP 1002, both for a friend that has not paid up yet. Even though Alpines were cool in the day, only the larger ones hold a value that is a fair amount less than the LPs.
Speaking of, I might as well test those LPs in my car to see if they work well. See how they compare to a kicker 4x85....
I've seen a lot of alpines, never seen one like that it must have been special in some way. But yes 2x50 is not much, I just can't get excited about small amps with large prices. In fact I paid less for a LP 1002 I have and more for another NIB LP 1002, both for a friend that has not paid up yet. Even though Alpines were cool in the day, only the larger ones hold a value that is a fair amount less than the LPs.
Speaking of, I might as well test those LPs in my car to see if they work well. See how they compare to a kicker 4x85....
I don't know anything about the old Alpine, but it looks cool. The heatsinks seem massive for 50W x 2! Maybe it does near 100W per channel at 2 ohms (says it can be bridged)? Then, the heatsinks make more sense.
I have a fairly minty LP1002. _In my opinion_ the power supply capacitance holds this amp back. Right before clipping at 4 ohms, with an o'scope on the power supply caps, there are significant dips in the power supply voltage during the bass beats. 🙁
I posted in another thread that a Proton 230 kicked the 1002. Of course the Proton has that class G power supply, but still...
The LP1002 is a nice amp that begs for some power supply mods. The output stage in the 1002 appears to coast along for the ride; never really breaking a sweat. You might expect that for TO-3 transistors at only 50WPC!
Yes, small world on the 5002!! I don't have it yet, but it's on its way.
I have a fairly minty LP1002. _In my opinion_ the power supply capacitance holds this amp back. Right before clipping at 4 ohms, with an o'scope on the power supply caps, there are significant dips in the power supply voltage during the bass beats. 🙁
I posted in another thread that a Proton 230 kicked the 1002. Of course the Proton has that class G power supply, but still...
The LP1002 is a nice amp that begs for some power supply mods. The output stage in the 1002 appears to coast along for the ride; never really breaking a sweat. You might expect that for TO-3 transistors at only 50WPC!
Yes, small world on the 5002!! I don't have it yet, but it's on its way.
I held one of these Linear Power amps in hands last weekend.
The condition is great. But I really cannot comprehend why some people are that weird about them.
They don't look very reliable to me...
...I rather stick to my PPI amps... 😉
The condition is great. But I really cannot comprehend why some people are that weird about them.
They don't look very reliable to me...
...I rather stick to my PPI amps... 😉
Hi Onkel Alex,
Most Japanese power amps (Denon, Alpine, Nakamichi or McIntosh) are far neater in construction. Solder joints are better too! Most American power amps look much rougher and seemed to have more bad solder connections. Just plain sloppy sometimes. The thing I never understood was why most components were mounted high. To avoid the lead trimming step?
This is my experience from providing warranty service through the 80's up until about 10 yeas ago.
One thing that really needs to be watched are those amplifiers that spread the output electronics for each channel to both sides of the heat sink. The bias control circuits don't track worth a darn. Bad enough they are in one casting, that practice really made things bad.
-Chris
They were not very neat in assembly. I thought that myself many times.
Most Japanese power amps (Denon, Alpine, Nakamichi or McIntosh) are far neater in construction. Solder joints are better too! Most American power amps look much rougher and seemed to have more bad solder connections. Just plain sloppy sometimes. The thing I never understood was why most components were mounted high. To avoid the lead trimming step?
This is my experience from providing warranty service through the 80's up until about 10 yeas ago.
One thing that really needs to be watched are those amplifiers that spread the output electronics for each channel to both sides of the heat sink. The bias control circuits don't track worth a darn. Bad enough they are in one casting, that practice really made things bad.
-Chris
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