Howdy,
I have a Hafler 100 Watt amplifier (stereo) that I need a preamp for. I'd like to find something inexpensive that is fairly easy to build for a first timer. I checked the diyAudio store and didn't see anything. I am not adverse to buying loose parts and trying to follow a schematic, but a complete kit, less enclosure, would be preferred. Thanks in advance!!
I have a Hafler 100 Watt amplifier (stereo) that I need a preamp for. I'd like to find something inexpensive that is fairly easy to build for a first timer. I checked the diyAudio store and didn't see anything. I am not adverse to buying loose parts and trying to follow a schematic, but a complete kit, less enclosure, would be preferred. Thanks in advance!!
The SSII headphone amp is a fantastic preamp, though it doesn't have any input switching in it's current configuration... Wouldn't be hard to add though.
So are all headphone amps also preamps?
I have a Hafler 100 Watt amplifier (stereo) that I need a preamp for.
Do you need a phono stage, and what are the other sources? This is a good line stage kit.
NEW JC-2 Preamplifier kit Class A Dual differential FET input PER-AMP Kit DIY-SN | eBay
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Do you need a phono stage, and what are the other sources?
No phono, will use a CD player or phone/pc for digital. Is it sacrilegious to use an amazon echo?
No phono, will use a CD player or phone/pc for digital.
Is it sacrilegious to use an amazon echo?
For the CD, all you need is a 10k stereo volume control (no gain).
The phone or PC will need some gain.
If you need some gain, this one is pretty much as simple (and inexpensive) as it gets:
LJM Mini P7 Preamp Kit For MX50 L20 L6 Power AMP DIY AMPLIFIER KIT J163 6976350784522 | eBay
If you replace the opamp with a better one such as LM4562, and replace the pot with an ALPS RK27 10K, the performance of this simple circuit will be hard to beat (IMHO).
Japan ALPS RK27 VOLUME Potentiometer Dual 10K 10KAX2 Slotted 6Pin | eBay
Kurt
LJM Mini P7 Preamp Kit For MX50 L20 L6 Power AMP DIY AMPLIFIER KIT J163 6976350784522 | eBay
If you replace the opamp with a better one such as LM4562, and replace the pot with an ALPS RK27 10K, the performance of this simple circuit will be hard to beat (IMHO).
Japan ALPS RK27 VOLUME Potentiometer Dual 10K 10KAX2 Slotted 6Pin | eBay
Kurt
Support our cause, you will have a pre-amp for a life time, the eBay stuff well I do not think so.
Doug Self Preamp from Linear Audio #5
Doug Self Preamp from Linear Audio #5
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Dunno.. Have some of those Chinese Clone "alps' Blu Box (At ~ 10bux.. it Ain't genuine.. period
That said the clones are almost as good as a genuine Alps.. which are long discontinued..
That said : the Cheap (well ~15 $) Chinese Clone.. Dact Stepped attenuator is a noticeably better performer than the Alps, real OR fake versions.
That said the clones are almost as good as a genuine Alps.. which are long discontinued..
That said : the Cheap (well ~15 $) Chinese Clone.. Dact Stepped attenuator is a noticeably better performer than the Alps, real OR fake versions.
... the Chinese clones are almost as good as a genuine Alps.. which are long discontinued..
They are still listed on ALPS's website as current production.
That said : the Cheap (well ~15 $) Chinese Clone.. Dact Stepped attenuator is a noticeably better performer than the Alps, real OR fake versions.
I also think the DACT clone is good, and it is a significant step up from the Alps pot in terms of accuracy and channel balance. The only thing I don't like about it is the shipping charge. You need to buy two at a time in order to have the cost averaged out to be ~$15 each.
DACT Type SMD Stepped Attenuator 21 step volume control pot D Shape Shaft | eBay
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