Peavey Mace Question

[guitaraddict]

Hi all, Anyone know of a sub for the TL604? I read here where Peavey makes a kit to wire around it, is that the way to go? Second question--would the mace work as a bass head with speakers designed for low frequency? Thanks all, David

[olddawg]

Hi all, Anyone know of a sub for the TL604? I read here where Peavey makes a kit to wire around it, is that the way to go? Second question--would the mace work as a bass head with speakers designed for low frequency? Thanks all, David

You'll have to get the sub from someone else. However, an amp is an amp. It will not damage the amp to amplify a bass. The Mace is well over 100 watts. If you run it through a speaker setup intended for bass it should work just fine. The voicing might be a little off but you could compensate with an EQ, a compressor, or both.

[Enzo]

Last i heard, PV was still making the workaround for the TL604. The chip hasn't been made in years and years. SOmeone has some NOS chips in stock at inflated price.


Often you can steal a good 604 from elsewhere in the circuit. For example, if you need to replace one of the preamp channel output sel;ectors or the one at the phasor output, steal the one from the reverb output. Then replace the reverb one with a jumper wire pin 3 to 6. That leaves the reverb always on - you still have the knob to turn down for no reverb.

The Mace is rated at 160 watts, not a ton for bass, but loud as hell for guitar. No reason it wouldn't work for bass though, as olddawg said.

[guitaraddict]

Thank you olddawg and Enzo. I am taking on a little more than I normally am comfortable with. Had one of these when I was young and now trying to rebuild a rough one. Have output on the normal channel, 5 working tubes and a schematic.....ready to step outside the comfort zone. Thanks again.

[guitaraddict]

Just an update. Happy ending I think. Bad 604 on the effects channel so I stole the one from the reverb as suggested and jumpered it. Bad automix input jack, I'll order one from Peavey. Two bad tubes and one 6ca7 stuck in there instead of 6L6. So got everything working on the 2 good tubes and will get some parts coming. Need to find or build a footswitch. Assuming Peavey doesnt sell those anymore but looks like 3 spst and one spdt switches will do the trick. Thanks for the help and advice. It turned into a good learning experience.

[Enzo]

The FS wiring is simple, and is on the amp schematic. PV won;t have that FS pedal, but they will custom make you one for a price. probably don;t need the reverb stomp switch now though.

PV will sell you the jack of course, but as far as I know the Automix jack is just a regular TRS with cutouts.

[Gtr_tech]

How 'bout a 4066 or something similar? Not pin/footprint campatible,but 4066s ain't goin' anywhere for a while. Could even make up a little board with discrete Jfet circuitry if ya had to.

[Enzo]

Oh sure, we could invent something ourselves - 4066/4016 sure, JFETs sure. What is the current chip that is similar, DG212?

[Gtr_tech]

Hmm....not sure. Haven't had to research it. But I find myself doing "kludge" jobs more frequently these days. Just yesterday I had to piggyback a dual op amp on top of an obsolete IC that had 2 op amps, 2 comparators, and a diode v-ref in it. Only 1 op amp section was bad...causing a false protect in one channel of a Crest CA4. So I soldered the IC onto a dip header with the op amp pins snipped off. Glued a socket on top of the chip and made the connections to the header pins with wire wrap. Its kinda ghetto, but it gets this thing back up an' runnin'.

[guitaraddict]

Necessity is the mother of invention for sure. Thanks again all. Probably have questions again before its all over, but so far so good.