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Recommendations for a speaker. I've purchased the kit, and would like to build it into a combo.
Asked by Anonymous on October 3rd, 2015.
This amp puts out a max 8 watts output with an 8 ohm load. I'd probably suggest either a Jensen C8R or C10R if you prefer a 10" speaker. A 12" speaker such as a C12R can be used as well. You can visit Jensentone.com to check out sound samples.
you suggest C10R or C12R, but what wattage?
The C10R and C12R are both 25 watt speakers.
I've built two of these amps and a third I modded a bit. They sound great through 12" speakers. Put it through a 4x12 if you want. It sounds huge through 12's.
Is a 80w-90w 1x12 cab ok for this or do I really have to go for 25w speakers? How will it affects the sound?
Asked by Anonymous on November 22nd, 2016.
In regards to speaker wattage, you can go up in wattage but you do not want to go down. An 80-90W speaker will work as long as the ohms match. Since this is an 8 watt amp, it is not going to, "push" you speaker to its full potential and break it up. Some people like speaker breakup and some people don't.
They sound great through my Egnater cabs. I have two 80 watt Celestion Elite speakers that I run it through and it sounds great.
Do you carry a higher end output transformer than the P-T31 that will work with the MOD 102+ amp?
Asked by mgb3333 on November 29th, 2017.
You can try either the P-T125CSE or P-T125DSE. The footprint will be different as these are larger transformers and you will have to drill at least one extra hole.
I just built a 102+ with a Classic Tone 40-18031 with 4-8-16 0hm taps with a rotary switch and dual jacks. Adds a lot of versatility and the tonal difference is huge.
A couple of questions above realted to Mod102+ indicate that the amp will run on 16 ohm load, even though it's rating of 8 watts is into 8 ohm load. Similar question on speaker load for the regular Mod102 says that to use 16 ohm load you need to change the transformer. Why the discrepancy here? I get why 4 ohm should not be used, but I would expect that either amp could take 16ohm with the expected output redeuction.
Asked by Anonymous on February 14th, 2020.
For optimum performance, we recommend using an 8 Ohm load with this kit.
I can imagine your brain flashing off all these questions as you read the part about 16 ohm speakers. My mind does the same thing all the time. Now if you knew about speakers the answers would have came right after the questions. Let me fill you in on a few fun speaker facts. Speakers wired in series will double the impedance in the circuit. This occurs because the impedance of each speaker is summed. In other words the signal path has twice as much resistance. Note that the volume of the two speakers will be cut in half in a 16 ohm circuit. We are talking 8 ohm speakers here but the math is the same for other impedance values. Speakers wired in parallel will reduce the impedance in the circuit by half., Two eight ohm speakers in parallel will present four ohm's on the circuit. The volume will double as well. Parallel wiring opens up a second path for the signal to follow making it easier on the signal. Keep in mind if your amp is not rated for four ohms you run the risk of damaging it. An eight ohm amp will need to produce twice the current to feed four ohms, the extra volume. It is safer to run sixteen ohms, but this will cut your volume in half. A four ohm and an eight ohm speaker wired together would not work out very well as they would have different volumes. I know it seems a waste to not use an old speaker that has been laying around and it is, just find the right application for it or perhaps trade it for something you can use. The main point here is that mixing speakers with different impedance values is not a good idea. The eight watt rating i think is optimal and the five watt rating is more realistic for this amp.. I do like the idea of running four twelve inch speakers with this amp. To do so you would need to wire two eight ohm speakers together in parallel, twice so that you had two four ohm circuits. You would then wire these two circuits in series to end up with eight ohms. Nice.
Can I order the enclosure with an IEC connection?
Asked by Anonymous on September 8th, 2015.
This amp is currently available only as a kit with no chassis customization options. We do offer IEC connectors for future modifications.
you suggest C10R or C12R speakers for this built,but what wattage????
Asked by Francois Poirier on December 30th, 2015.
The C10R and C12R are both 25 watt speakers.
How watts RMS is the amp output?
Asked by Anonymous on February 11th, 2016.
This amp is capable of providing 8W of output power.
How about using a Jensen P10R Vintage Alnico 8Ω speaker? Any reason not to use one? Thanks.
Asked by Anonymous on November 11th, 2016.
Since this is an 8w amp at 8ohms, an 8ohm P10R should work just fine and sound fantastic.
How would the chassis cage mentioned above work....picture only shows one side but what about access to the controls etc...
Asked by Anonymous on February 24th, 2017.
It attached to the top of the chassis flush. That way there is no obstruction to the controls.
Can you flip it over and build a little combo out of it?
Asked by Anonymous on July 18th, 2017.
Yes, some people have mounted this as a combo.
Can I get this kit with the Hammond 369EX power transformer to suit foreign (Australia) mains power (240v)?
Asked by Anonymous on August 29th, 2017.
Yes, do a search for K-MOD102-F. This is our foreign version of this kit.
I really want to get the '+' options with the 'mid-boost', 'bright' and 'turbo'- I don't think the K-MOD102-F kit comes with these options.
Asked by Anonymous on September 13th, 2017.
You will want to order this kit and this power transformer: P-T369EX. The footprint is different and you will have to re-arrange it on the chassis.
Is it possible to install a circuit or relays in order to turn on/off the Mid, Bright and Turbo functions on the amplifier via a foot switch?
Asked by Anonymous on December 25th, 2017.
This would be possible and at the discretion of the builder. We would not be able to offer and support on how to achieve this mod.
Can I add a reverb tank to this kit?
Asked by Anonymous on March 8th, 2018.
Not without modification and that would be at the discretion of the builder. We do offer a reverb tank kit called The Wave. Do a search for: K-MOD103.
It is a device that supports 220V in the Europan electricity network ?
Asked by Anonymous on August 10th, 2018.
We do not offer this kit with a 220V transformer but we can special order this transformer for you: https://www.amplifiedparts.com/products/transformer-hammond-power-190-0-190-v-75-ma. Please note that this transformer will not fit the footprint of the chassis and you will need to drill a hole or two to make it fit.
Hello. Which transformer would I need for 240V AC in Australia?
Asked by Anonymous on September 22nd, 2018.
The P-T369EX should work electronically, but may have a different footprint. Modifications to the chassis may be necessary for installation.
Would it work with a 16ohm speaker (of course with overall lower power output)? I have a cab and wanted a small head like this to use it along with my cab
Asked by Anonymous on January 17th, 2019.
Yes, it is safe to use a 16 Ohm speaker with this amp.
What does the Turbo switch do? Is it for gain?
Asked by Anonymous on November 22nd, 2019.
Yes, it is essentially a boost to allow for more drive and compression.
I see it is only has one 8 ohm output.
If I expanded from 1x12 8 Ohm speaker to a 2x12 8 ohm speaker would it be better (safer for the amp) to wire in series or parallel to have 4 or 16 ohms? Or can I combine an 8ohm and 4 ohm speake in series to split the difference at 12ohms safely?
Or is there a mod of the mod kit that will let me change the ohms output?
Asked by Prudhom on February 10th, 2020.
For optimum performance, you would want to run a 2x12 cab with two 16 Ohm speakers in parallel or with two 4 Ohm speakers in series. If this simply isn't an option, we suggest wiring two 8 Ohm speakers in series to get a 16 Ohm rating.
if i wanted to put different potentiometers Could I?
Asked by Anonymous on February 26th, 2020.
This is a kit and you are free to make any substitutions you desire. Keep in mind, any additional potentiometers would have to be purchased separately, and we do not support modifications of this type for our kits, so we would not be able to advise on what you need or how to install them.
I have enjoyed building and playing my Mod102 amp. It ws installed in a cabinet with an internal speaker. I am planning on adding a power standby switch, headphone jack and a jack for external cabinet. Can this amp handle a no-load situation? I do have a circuit plan that would switch between the internal board speaker and the external cabinet. However, if the external cabinet is not plugged in then the amp would have no load. Obviously, this would not be a normal situation but could occur by not paying attention when turning the amp on.
Asked by DougWheeler on November 1st, 2020.
Using the amp with no load is not recommended and can damage the amplifier.