Re: Toe to toe or no?
It should be treated as a bass reflex as far as damping. I'd line the walls with 1/2" cotton or wool felt.
dave
Phil Townsend said:
It should be treated as a bass reflex as far as damping. I'd line the walls with 1/2" cotton or wool felt.
dave
Re: Re: Nice Work Phil!
What do you think of the Dalek cab (or the like) for these drivers? It seems like it could work well or be modified to work with the big depth of the Feastrex drivers..
I never read this thread before and all I can say is wow these look amazing. Too bad these can't be made more affordable for the average blue collar Joe to try....
I'm not the kind to go for the ''eye candy'' look in audio products but it could be cool to have the area that the driver mounts to, such as the whole compression chamber done in thick lexan or plexi just for fun... Dave
Scottmoose said:
What do you think of the Dalek cab (or the like) for these drivers? It seems like it could work well or be modified to work with the big depth of the Feastrex drivers..
I never read this thread before and all I can say is wow these look amazing. Too bad these can't be made more affordable for the average blue collar Joe to try....
I'm not the kind to go for the ''eye candy'' look in audio products but it could be cool to have the area that the driver mounts to, such as the whole compression chamber done in thick lexan or plexi just for fun... Dave
Well, you'd have to design the cabinet from scratch if you want something ~optimal for the driver. These units are IMO a little too high in Q to ideally suit a regular style of long-path BLH though. Yes, you can get the bass right by designing it properly, but the HF is likely going to drop off a bit.
to get around the big bulbous magnet blocking the pipe just make a fat segment of the pipe, think of a python that's swallowed a golf ball.
An octagonal shaped bump in the pipe with an oval supra baffle over the front will look pretty good.
It's only 22.5 degree cuts, it would be pretty easy with a table saw.
An octagonal shaped bump in the pipe with an oval supra baffle over the front will look pretty good.
It's only 22.5 degree cuts, it would be pretty easy with a table saw.
Not sure what the standing waves would say about it. 😉 Should do fine for a BR box at least though.
Feasterex and box...
Just finished installing the new 5k/ 16 ohm transformers from Magnequest.
I was running the feastrex at 8 ohm cause thats what I had installed in the 45 amp.
The difference is staggering...(duhh)
More bass
more upper octave extension
Louder at the same vol setting.
These drivers are blowing me away.
If any of you guys are sittin on the fence for these drivers...all I can say is...
JUMP!
Just finished installing the new 5k/ 16 ohm transformers from Magnequest.
I was running the feastrex at 8 ohm cause thats what I had installed in the 45 amp.
The difference is staggering...(duhh)
More bass
more upper octave extension
Louder at the same vol setting.
These drivers are blowing me away.
If any of you guys are sittin on the fence for these drivers...all I can say is...
JUMP!
Phil,
Which MQ iron did you get in? I have the RH-40 outputs in a small 45 amp. It has 8/16 ohm taps... installed a switch. I have to open up the Hashimoto based amps to change the wire over to 16.
All descriptions sound right for loading the 45 properly... before it was closer to a 10K load.
Regards, KM
Which MQ iron did you get in? I have the RH-40 outputs in a small 45 amp. It has 8/16 ohm taps... installed a switch. I have to open up the Hashimoto based amps to change the wire over to 16.
All descriptions sound right for loading the 45 properly... before it was closer to a 10K load.
Regards, KM
16 ohm iron...
Mike sent me the EXO 46 ni Nickel cores.
They are the ones for parafeeding.
These are 5k to 16 ohms.
The plate chokes are also from Mike BCP-15 (40 h @50ma)
I'm thinking about going to a 200h choke just for fun.
I'm also running Mikes grid chokes as well.
Mike sent me the EXO 46 ni Nickel cores.
They are the ones for parafeeding.
These are 5k to 16 ohms.
The plate chokes are also from Mike BCP-15 (40 h @50ma)
I'm thinking about going to a 200h choke just for fun.
I'm also running Mikes grid chokes as well.
Thinking about a
Thinking about a pair of silver EXO 46 ni for the outputs...
Whats so cool about the Feastrex drivers is ANY change you to to the topology of the amp and I do mean ANY ...The change is so very plain to hear....
For example:
I was running Audio note grid stoppers on my preamp... 2 days ago I swapped out the A.N. with some Allen Bradley NOS carbon Comps...
O.K. its not a topology change but the Allen Bradleys were clearly sooo much better in THAT position.
The Feastrex is kinda like an audio microscope...small changes make big impressions that are easy to hear. Feastrex makes voicing an amp a walk in the park.
I,m thinking I might want to buy some more "V" caps...
My credit card is going to feel more pain this month.
You know, I do love this stuff.
Thinking about a pair of silver EXO 46 ni for the outputs...
Whats so cool about the Feastrex drivers is ANY change you to to the topology of the amp and I do mean ANY ...The change is so very plain to hear....
For example:
I was running Audio note grid stoppers on my preamp... 2 days ago I swapped out the A.N. with some Allen Bradley NOS carbon Comps...
O.K. its not a topology change but the Allen Bradleys were clearly sooo much better in THAT position.
The Feastrex is kinda like an audio microscope...small changes make big impressions that are easy to hear. Feastrex makes voicing an amp a walk in the park.
I,m thinking I might want to buy some more "V" caps...
My credit card is going to feel more pain this month.
You know, I do love this stuff.
Yes, the silver gets expensive.... and Mike makes some nice iron... and is a really nice guy. Sounds like you have a pretty nice amplifier overall... and as you said, changing the type of part can make a difference.... even chassis wiring and solder make a difference. Any pics of the amp surgery?
When I designed the 45 amps, I decided on part types for everything.... for resistors I'm using Caddock TF, MK and MP series in the amplifier circuitry and Mills MRA5 and MR-200 in the power supply. I did opt for all Axon caps... the 630V High-Volt film in the power supply (no electrolytics anywhere), 250V TrueCap for all bypasses and a single tin-foil/film for coupling. I also used pure silver wire everywhere audio could go.
The resulting sonics are excellent... and they are dead quiet in operation, no mechanical buzz or hum (even the power tranny is dead silent) and output noise is below 130 microvolts.
Once I get the cabinets assembled next week, I'll swap to the 16-ohm tap and have some fun.
Regards, KM
When I designed the 45 amps, I decided on part types for everything.... for resistors I'm using Caddock TF, MK and MP series in the amplifier circuitry and Mills MRA5 and MR-200 in the power supply. I did opt for all Axon caps... the 630V High-Volt film in the power supply (no electrolytics anywhere), 250V TrueCap for all bypasses and a single tin-foil/film for coupling. I also used pure silver wire everywhere audio could go.
The resulting sonics are excellent... and they are dead quiet in operation, no mechanical buzz or hum (even the power tranny is dead silent) and output noise is below 130 microvolts.
Once I get the cabinets assembled next week, I'll swap to the 16-ohm tap and have some fun.
Regards, KM
Re: Thinking about a
Hi Phil,
Good to hear you are enjoying the drivers... Yes, the resolution of the Feastrex drivers is so good that any changes you make will be very obvious... In fact don't know if you have realised by now... You can very easily hear the difference/improvement of your system from cold start to fully warmed up.. 🙂
Phil Townsend said:
Hi Phil,
Good to hear you are enjoying the drivers... Yes, the resolution of the Feastrex drivers is so good that any changes you make will be very obvious... In fact don't know if you have realised by now... You can very easily hear the difference/improvement of your system from cold start to fully warmed up.. 🙂
Hey William,
I spoke to Mr. Teramoto on the phone a few hours ago. You had better warn your friend Mr. O. to get his personal affairs in order now, while there is still time, because Mr. Teramoto is going to seriously mess with his life with the new nine-inch field coil drivers he's building for him. To hear Mr. Teramoto describe them, Mr. O. will be venturing into totally new, previously uncharted territory with these drivers -- a veritable "twilight zone" of audio. If he goes in and doesn't come back out again, don't blame me! Nobody can say he wasn't warned . . . 🙂
-- Chris
I spoke to Mr. Teramoto on the phone a few hours ago. You had better warn your friend Mr. O. to get his personal affairs in order now, while there is still time, because Mr. Teramoto is going to seriously mess with his life with the new nine-inch field coil drivers he's building for him. To hear Mr. Teramoto describe them, Mr. O. will be venturing into totally new, previously uncharted territory with these drivers -- a veritable "twilight zone" of audio. If he goes in and doesn't come back out again, don't blame me! Nobody can say he wasn't warned . . . 🙂
-- Chris
cdwitmer said:
Hi Chris,
Yes, I think he's mentally prepared for the 9" Field Coils.... 🙂 We can't wait to get them up and running... unfortunately bottleneck is always with the carpenter.
Btw I just got the D5nf with the PB9s up and running.. Still running in the spks but WOW
The PB9s really make the D5nfs sound like a huge floorstander spks, I really like the huge soundstage and bass extension that the PB9 gives.... Will post some pictures after I get back from my trip.
Matt came over to my house
My friend Matt, who too lives in Santa Fe, came over yesterday to give the Feastrex a listen....
Here is what he said today...
"I've been thinking about hearing those speakers. It's kind of funny, there is nothing about the speaker that sticks in my mind except wanting to listen to more music." Matt Wiebe
That just about sums it up in a nut shell.
They suck you in.
My friend Matt, who too lives in Santa Fe, came over yesterday to give the Feastrex a listen....
Here is what he said today...
"I've been thinking about hearing those speakers. It's kind of funny, there is nothing about the speaker that sticks in my mind except wanting to listen to more music." Matt Wiebe
That just about sums it up in a nut shell.
They suck you in.
cdwitmer said:
I wasn't kidding .
I have at my place for short period pair of 12" ,almost good as my RCAs ....... without whizzer and all gizmos
it's certainly possible for someone with knowledge and passion 😉
As a coaxial 2-way driver, the PHY KM30 is "cheating," is it not?
Maybe this would be a more "purist" example of a 12-inch fullrange:
http://www.emspeaker.fr/
. . . in any case, I think it will be a LONG time before Feastrex tries to produce a 12-inch fullrange driver . . . if ever.
-- Chris
Maybe this would be a more "purist" example of a 12-inch fullrange:
http://www.emspeaker.fr/
. . . in any case, I think it will be a LONG time before Feastrex tries to produce a 12-inch fullrange driver . . . if ever.
-- Chris
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