androuski said:Great
What kind of speakers is it driving ?
Hi,
MONITOR AUDIO GR10's
Specifications:
Drivers: One 1" Dome Tweeter, One 6 1/2" Mid-Bass Driver
MFR: 40 Hz - 30 kHz ± 3 dB
Nominal Impedance: 8 Ohms
Efficiency: 88 dB/W/M
Power Handling: 100 Watts RMS, 300 Watts Peak
Size: 14 3/4" H x 8 3/4" W x 11 1/2" D
Weight: 20 Pounds Each
Attachments
audio1st said:Hi,
Just finished fitting "Pedja's Discrete regulator" into my LM1875 Amp.. Had to end up using four, 25V, 30VA transformers because space was tight, (and I had them already
Loving the sound, a match made in heaven
Hi Barry
How has the sound improved when compared to your previous supply?
Ive yet to hook-up my discretes
Richard
Rainwulf said:
The pictures show an early stage, earthing has been added since. WRT the thickness of the PSU links, please enlighten me, how much resistance would I lose if I were to use the thicker wire for the PSU links? I have a gut feeling that the loss in resistance is negligible, the links being so short in lenght. Would I be able to measure that difference with a DMM?
Tripmaster said:
Hi Barry
How has the sound improved when compared to your previous supply?
Ive yet to hook-up my discretes
Richard
Hi Richard,
The difference that I have noticed is improved bass.
It's not lower (12ft x 12ft room), you just know it's there, not bloated either, controlled.
The mid's are as smooth as ever and the treble is bright, without distress.
I wasn't after mega bass and high volume, mainly late night listening.
Feeding the amp with 25vDC (same as previous), still no Ci (feedback cap), DC offset of 5mV each channel. Using with Active pre-amp.
Runs warmer than I remember, may just be the regulator sharing the heat-sink (case).
The relays on the speaker's output, are on a simple time delay (from Nick's website). This may be replaced with a speaker protection circuit. The LM1875, I have found, suffers from power on/off pops and clicks, the delay speaker turn on and instant turn off cures this.
Barry.
my ref revC- my build
Finished up my chipamp a few days ago.
Many thanks to Mauro Penasa for a great design, and to Uriah and Peter who organized the recent group buy. Also to all the folks who contribute to the posts here- lots to learn.
It sounds excelllent and went together without any problems.
Case/chassis/transformer/heatsink is a recycled thrift store Sansui receiver.
Garry oak with tung oil finish.
It'll take a few messages to attach the pics, since the forum doesn't allow multiple attachments.
Cheers
John
Finished up my chipamp a few days ago.
Many thanks to Mauro Penasa for a great design, and to Uriah and Peter who organized the recent group buy. Also to all the folks who contribute to the posts here- lots to learn.
It sounds excelllent and went together without any problems.
Case/chassis/transformer/heatsink is a recycled thrift store Sansui receiver.
Garry oak with tung oil finish.
It'll take a few messages to attach the pics, since the forum doesn't allow multiple attachments.
Cheers
John
