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DIY Dual Mono Power Amps

Last post Mar 12, 2010, 11:01 PM by Craig M.. (106 replies)
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Posted on Jun 29, 2009, 8:41 PM

271344

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

idc:
Shame to hear about the delay for the Starving Student amp build. Since you are asking about upgrades, how about the AKG K702 over the Grados?


I have been wondering if I should upgrade my headphones. I'd like to but.....
My useful(?) threads can be found here.

Posted on Jun 29, 2009, 9:24 PM

272060

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

The Neutron 4s are rated at 8 ohms according to this source. I'm fairly confident that the 5s are too. That's only nominal impedance mind.
Musical Fidelity X-Ray v8 → AVI S2000MP → Quad 405 Netaudio MK3 Dual Mono (Burr-Brown OPA627) → Spendor SA1 + Rel Quake (with 15kg of slate on it!)

Posted on Jun 29, 2009, 9:30 PM

272085

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

igglebert:
The Neutron 4s are rated at 8 ohms according to this source. I'm fairly confident that the 5s are too. That's only nominal impedance mind.

Thanks igglebert. Noticed the dimensions. They're only 21cm deep. That's not too bad. Hmmm. And it'd save me a few quid over the dinkys.
My useful(?) threads can be found here.

Posted on Jun 29, 2009, 9:40 PM

272093

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

They're bloody good speakers, trust me. I first heard them on the end of an old Quad 405 and they sounded fab. I'm not a big bass person so they work for me. If you want big bass in conjunction with that amp you're building then you could always get a REL Quake or MJ Acoustics sub at some point. That would keep the heavy stuff in it's own amp.

EDIT Review here
Musical Fidelity X-Ray v8 → AVI S2000MP → Quad 405 Netaudio MK3 Dual Mono (Burr-Brown OPA627) → Spendor SA1 + Rel Quake (with 15kg of slate on it!)

Posted on Jun 29, 2009, 9:52 PM

272096

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

Do you think they'll be alright on wall brackets? Or will the bass just disappear.
My useful(?) threads can be found here.

Posted on Jun 29, 2009, 10:11 PM

272104

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

I have no idea. My dad just put his MA S4i on some wall brackets but I haven't been over to hear them yet. I suspect you could be smart about putting them near corners. You might be surprised what they can achieve but, again, it's difficult to say as your amp is an unknown! Sorry, not being much help...
Musical Fidelity X-Ray v8 → AVI S2000MP → Quad 405 Netaudio MK3 Dual Mono (Burr-Brown OPA627) → Spendor SA1 + Rel Quake (with 15kg of slate on it!)

Posted on Jun 29, 2009, 10:38 PM

272116

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

No, you've been a great help. Thanks.
My useful(?) threads can be found here.

Posted on Jun 29, 2009, 11:37 PM

272126

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

The bass on my ProAcs is ok and they are on wall brackets. (They sound better on stands though).
Unison Research Unico CDE/Audio Analogue Maestro Settanta/Kudos C2 and ProAc Tablette Reference 8 Sigs. Nordost, Clearer Audio, Kimber, Crystal Cable and Chord cables. And a MacBook Air for streaming. And a plasma. And a DVD player. And an iPhone.

Posted on Jul 01, 2009, 10:54 PM

272153

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

I've just gone completely bonkers and bought some rather expensive (for me) RCA sockets and binding posts.


CMC805-CU-AG: Pure Copper, Silver Plated RCA Sockets


CMC858-MU-AG: Pure Silver Plated Pure Copper Teflon Insulated Long Binding Posts (gold pictured)
My useful(?) threads can be found here.

Posted on Jul 03, 2009, 9:57 PM

273061

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

The cases have arrived from Italy (in 4 days) as have the RCA and Binding Posts. Here's a few pictures.


Nice parcel from Modu


Well packed, protecting contents


Well wrapped


Two cases, feet for both and two 10mm thick front panels


Nice feet


Lots of space for the fully encapsulated and potted toroidal transformer, PSU PCB and chip amp PCB.


Hopefully, there's enough space to allow an upgrade to a discrete amp circuit at a later date.


With the lid on.


OMG, these are lovely!


As are these. Fantastic quality.

So. The cases, sockets and binding posts come out at ~ £200. Gulp.
My useful(?) threads can be found here.

Posted on Jul 03, 2009, 10:04 PM

273965

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

You know it'll be worth it in the end. Fantastic stuff. I might get some of those posts for my Quad...
Musical Fidelity X-Ray v8 → AVI S2000MP → Quad 405 Netaudio MK3 Dual Mono (Burr-Brown OPA627) → Spendor SA1 + Rel Quake (with 15kg of slate on it!)

Posted on Jul 03, 2009, 10:12 PM

273972

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

Ya know, I might prove to myself that high price tag kit can still sound rubbish! Or worse still, not even work!
My useful(?) threads can be found here.

Posted on Jul 03, 2009, 10:15 PM

273978

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

Still, it's quite exciting.....or is that dread I'm feeling? Somehow, I've managed to avoid discussing precise costs with my Wife.....but I guess she twigs that custom cases from Italy don't come cheap.
My useful(?) threads can be found here.

Posted on Jul 03, 2009, 10:29 PM

273981

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

So are you going to build your own pre? If not I would recommend an AVI S2000MP as a good used buy for an active pre...
Musical Fidelity X-Ray v8 → AVI S2000MP → Quad 405 Netaudio MK3 Dual Mono (Burr-Brown OPA627) → Spendor SA1 + Rel Quake (with 15kg of slate on it!)

Posted on Jul 03, 2009, 10:40 PM

273989

Re: DIY Dual Mono Power Amps (for use with the Beresford DAC)

Yeap. That's the idea. Beresford for starters....moving onto the Aikido(mentioned earlier in the thread).....or something similar.


My useful(?) threads can be found here.
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