[audiopile]

Couple of basic questions about the smaller Hafler amps:
1.) Does the SE-120 phase invert?
2.) Does the DH-120 phase invert?
3.) Input impedance of SE-120 is ?
4.) Input impedance of DH-120 is?
5.) Voltage for full output of SE-120 is?
6.) Voltage for full output of DH-120 is ?
Even partial info will be much appreciated.

 

[rickcr42]

DH-120 manual .2.9 mb :

http://www.hafler.com/techsupport/pd...20_amp_man.pdf

Se-120 manual 866K :

http://www.hafler.com/techsupport/pdf/SE120_amp_man.pdf

more manuals for download here ;

http://www.hafler.com/techsupport/index.asp?ID=3

 

[jnewman]

I can't actually tell you any of that... but I have the DH-120's bigger bigger brother, the DH-500, and it's a GREAT amp.

 

[audiopile]

Thanks Rickcr42 - the pdf manuals that fosgate has on their tech support link do the job. Really have to appreciate Fosgate for providing this information on products they either never made ( DH-120) or made over a decade ago (SE-120).
Does anyone know if the MOS-FET output devices used in these amps are still available?

Again - thanks Rickcr42

 

[rickcr42]

Most likely the parts aree obsolete but there are newer / better devices that should either drop right in or with minimal changes such as rf bypass caps and maybe bias resistor changes work fine .
Just watch the gate capacitance of the mosfets-you can go lower but not higher ,and the VA rating -higher but not lower