Need replacement bass units for TDL Studio 1 speakers

Please see my previous answer.

Yes you are,

Open the unit and remove one wire from one of the woofer terminals and using an ohmmeter check the resistance between the terminals. It probably should be between 6 and 16 ohms... they don't give the specs on the speaker... if it is very high or infinite resistance, the voice coil is blown and you be re-coning or buying new speaker. These are close in speakers and intended for a small room for studio listening while mixing. If the speaker is OK, then the bass amp in the cabinet has a failure... pray, as that is cheaper to repair than a speaker.

Hi, I hope this helps,

Pins look like this: (Top view, not copper side)
1 2 3 4 5
6 7 8 9

1 = Thin white wire from thick white cable (Left input)
2 = Gray (Speaker out)
3 = Orange (+V return from volume unit to bass unit)
4 = Not connected
5 = Thin Red wire from thick red wire (Right input)
6 = Blue (+V power from bass unit to volume unit)
7 = Black (GND - if socket removed, solder 3 socket shield holes to each other or solder black wire directly leftmost hole)
8 = Not connected
9 = Shield copper from thick red wire

Shield copper from thick wire : Solder to GND or Left unconnected

swop the speakers overs this will tell you weather it is the speaker or the amp. if the speaker then it has blown or the crossover unit has blown. the crossover unit splits the signal to the bass /middle and top frequencies. if you want an easy way out after you have checked the speakers/amp by swoping them just go and buy a new pair but make the sure they are the same impedance as the old pair as you can easily damage the amp

get some higher rated speakers as this will happen time after time, or you could turn the bass down lol

The setting of the volume controls bears LITTLE importance to the actual level the unit is being run at since one can send high levels INTO the units from the source. These are intended to be used in a studio for the audio engineer to listen to in a small room. They should really be no louder than a consumer BoomBox maximum.

A squeaking noise is not normal at a level such as mentioned however. You might see if the noise is from the speaker itself or possibly parts of the cabinet... Plastic parts are NOTED for squeeking and can be suitably lubricated.

Beyond that, since the units are new, you should be able to exercise your warranty.

(Please read the whole thing before opening anything)
Loose connections inside either the receiver or the subwoofer. Open the subwoofer case (the screen should pop off, if there is no screen there is usually some hidden screws somewhere) and see if there are any wires that have been separated. The problem with subwoofers (more common in car audio) is that they will vibrate so much that when you have something meant to have a lot of bass without the subwoofer and then you add the subwoofer to it, it's overpowering it which causes it to vibrate harder; seperating the cord that attaches the fabric of the speaker itself to the metal harness.
You can do one of 2 things:
1) Souder the wires back together using a heat sink.
2) Get allagator clips, cut them down pretty short and just extend the length of the wires a little bit giving it more bouncing room. Caution with this because if you dont cover the clips and they touch the metal frame, you will have no sound. Electric tape them once they're on.
If nothing is seperated, check the input jacks from the speaker box frame to the speaker itself. Loose connections are common for the crimp on kind.
Also a good idea: if you really (I mean really) want bass and you have no neighbors within a 1/4 mile radius of your house, have a friend who is getting rid of his car woofers to hook you up an AC outlet from the power source, and then use the red and white cables going into the amp to come from your receiver. I've seen this and it's great when watching a movie or playing games. Surrounding people hate it. (Wonder why?)

I'm guessing that you have Bi-wireable binding posts on the back and your jumper straps are not installed. You'll be able to tell if they are biwireable if there are 4 sets of speaker connections vs the standard two. When you are only using one set of speaker wires you need to have metal straps installed between the upper and lower pair of connections so that all of the drivers are getting signal.