I recently acquired an old Peavey TNT 100 from an aunt of mine with a busted speaker. I havent checked the speaker in it as it is at a friends house for the time being in storage. I have got the money to replace the speaker and have read that it requires an 8 ohm 15" speaker. I understand the concept of impedance and that the amp must be 4 ohm stable to have a 4 ohm driver placed in it, but I cant understand the manual. Is it ok to put a 4 ohm speaker in this amp? What will it affect?
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Speaker Replacement
- Thread starter boytcam
- Start date
** If memory serves *** the old TNT series had a jack for an extension speaker (8 ohms) and by doing so it pushed a total 4 ohm load safely.
SO ... you *could* put a 4 ohm speaker in it, and instead of something like 115w RMS you would be pushing 140w RMS. However, the differences between drivers are substantially more than any volume difference that might offer.
You need to choose a speaker that is likely to sound good in that box. The simple solution, is a Peavey Black Widow (used on some of the later TNT models). They tend to be pretty sensitive and have a lot of midrange bark; loud for the money.
If you wanted to retune the cabinet for another speaker, you would find that a 12" is the best match for the volume you have. You can retrofit that way if you enjoy a project. All the information you need is available here by searching on Speaker Cabinet Building.
You will NOT be able to open the box up; your only access will be thru the hole where the speaker is mounted. Its 3/4" plywood, stapled, dadoed, and glued.
SO ... you *could* put a 4 ohm speaker in it, and instead of something like 115w RMS you would be pushing 140w RMS. However, the differences between drivers are substantially more than any volume difference that might offer.
You need to choose a speaker that is likely to sound good in that box. The simple solution, is a Peavey Black Widow (used on some of the later TNT models). They tend to be pretty sensitive and have a lot of midrange bark; loud for the money.
If you wanted to retune the cabinet for another speaker, you would find that a 12" is the best match for the volume you have. You can retrofit that way if you enjoy a project. All the information you need is available here by searching on Speaker Cabinet Building.
You will NOT be able to open the box up; your only access will be thru the hole where the speaker is mounted. Its 3/4" plywood, stapled, dadoed, and glued.
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See the Speaker usage reference guide pdf at Invalid Link Removed - the driver for that model's probably listed there.
Why not just get the speaker reconed, or get a speaker basket?, granted finding a 4 Ohm speaker basket might be hard to find
If it's an old TNT100 it had an old square magnet 15 in it from before they made Black Widows. Used to be one at the house where I practiced with an old band, I considered it a fart box ie. get to a proper rehearsal volume with a pop/rock cover band and it just plain ran out of gas. Pretty much any 15 you come across now will sound at least as good, probably better regardless of box/tuning stuff as long as it isn't an auto-sub type speaker.
Also the TNT100 came with an 8ohm speaker and an extension speaker jack you could hook up another 8ohm speaker to resulting in 4ohms and 2 speakers.
You could put a 4ohm speaker in it and it would play ok by itself but that would eliminate the ability to connect a 2nd/extension speaker.
By itself, it's a good, bassy sounding practice amp. You really need 2 of those old square magnet speakers to play with a drummer and/or gig your local bar. They're from before people really started making "bass" speakers. The only 2 real bass rigs out then were the SVT and maybe Acoustic.
Also the TNT100 came with an 8ohm speaker and an extension speaker jack you could hook up another 8ohm speaker to resulting in 4ohms and 2 speakers.
You could put a 4ohm speaker in it and it would play ok by itself but that would eliminate the ability to connect a 2nd/extension speaker.
By itself, it's a good, bassy sounding practice amp. You really need 2 of those old square magnet speakers to play with a drummer and/or gig your local bar. They're from before people really started making "bass" speakers. The only 2 real bass rigs out then were the SVT and maybe Acoustic.
Ok, so let me tell yall why i want the 4 ohm, and plz dont bash me I know its rediculous. The TNT will be a last resort/practice amp, but I want a 4 ohm speaker in it so i can wire another jack that will bypass the amp and go straight to the speaker making it essentially a cheap 1 x 15 extension cab for My gigging crate combo which I love. I would love to just buy an ext. cab but i have no money for it as im in the process of moving, but I have a friend with a newer peavey 15" bass amp that is fried he said he'd sell me the speaker out of it for 20 bucks. It is 4 ohms, but he is selling the amp itself to sum1 else. So is it too rediculous of an idea?
You could maybe do that, but it's not simple. You'd have to actually have a switch that physically disconnects the set of wires that the TNT uses internally. If you just wire a jack in parallel and hook another amp to it, that amp would also be sending power INTO the Peavey amp, turning everything in the chain into a smoldering heap and maybe involving the fire department.
But if you were to have a switch that actually cut off the wires when you wanted to use it as an extension then it could work. Not sure I would bother though, and you HAVE to remember to throw the disconnect switch before using it as an extension.
But if you were to have a switch that actually cut off the wires when you wanted to use it as an extension then it could work. Not sure I would bother though, and you HAVE to remember to throw the disconnect switch before using it as an extension.
put in the 4 ohm and use both combos. You might be able to run the Line out on the crate to the effects in on the TNT. This way you use the Crate preamp and power unit in the tnt to run the new speaker. This will essentially have the Crate as the preamp with a separate power unit for each speaker.
Hopefully this was clear. I have done this a few times and there are a lot of posts on this forum of members of doing this.
Hopefully this was clear. I have done this a few times and there are a lot of posts on this forum of members of doing this.
