I would just remove the bridge module. And use it. I know some amps it is more complex then
Others but why not ??
Welcome to head-fi. Sorry about the... oh wait, you're the one selling the kool-aid. Nevermind
You can't just remove a bridge module. There's no such thng as a bridge module... what are you talking about?
Okay, enough about the Wee and its explosive potential. .
And now for something completely different: has anybody used this cable with their HD650/600?
I need it in order to tie into my speaker tap. I was going to try the Senns with both the Cyclops and the Millenia/MG3 (using the same resistor box I use with the LCD-3s, knowing it probably isn't optimal). Any (explosive/non-explosive) issues with this setup that I should know about?
Just wondering, would something like this make an improvement to the TBI? http://www.aloaudio.com/the-passport
It would probably be able to drive the Millenia, but there are lots of 12v options out there for less money -- as in buying lithium batteries., or the LiFePo batteries Mike (Zilch) has been using. In addition, according to Jan Plummer and verified by various folks, including Mike, the amp really wants more than 12v. There are also lots of options for more voltage, including the tried (by lots of folks on Audio Circle) and true approach of using a pair of SLA batteries in series, or LiFePo, or some of the lithium batteries for laptops. And then there are linear power supplies. All of these solutions can be had for <$200, i.e., less than the passport.
I certainly agree with Gary's response - the Passport's 12VDC output will allow the MG3 only 10Wpc into 8-Ohm (vs. 24VDC, which allows the MG3 to deliver 32Wpc into 8-Ohm).
But I'd like to offer some warnings about my 24VDC battery-powered solution for the MG3.
I am currently using this 3600 mAh, 6-cell LiPo to power the MG3 at 25.2V (fully charged) down to 20.4V (when I put it back on the charger):
And I recently purchased this larger, 5300 mAh, 6-cell, LiPo (having the same length as the one above), on sale at the manufacturer's web site: http://www.gensaceusa.com/98p-30c-5300-6s1p.html
These things are somewhat dangerous, however, as this 30C-rated, 5300 mAh version can supply 159 Amps continuously, without overheating (peak current is much higher still).
Their discharge must be monitored during use, to prevent then from dropping below 3.0V per cell - which can damage the battery and even cause fires that emit toxic soot and smoke, even if they don't burn down your house. Charging requires some know-how, too, using a "balanced charger" like the Thunder AC6, to ensure that individual cells are not charged to voltages higher than 4.2V, which again, can cause damage and increase the possibility of a fire.
In other words, I don't recommend this solution unless you're "into batteries" and can enjoy the ritual of being disciplined in safe handling.
Hi Roberto, (makes you sound like a ladies man, yes?)
My opinion.................use the two resistor network.
I like the idea of resistor #3 in your diagram.
#2 gives you the attentuation you may need, #3 adds some damping to the system i.e. makes the amp output impedance appear to be low (in some respects).
Personally, I'm not a big fan of using an old receiver with a 120 Ohm (or 220 Ohm or whatever) between the headphones and the power amp, it's just not very versatile, with many headphones the interaction between the series resistor and the headphones can create frequency response aberations.
A properly chosen value for Resistor #3 greatly reduces that effect.
You guys already do all this when you chose R2 = 12 Ohms, R3 = 4 Ohms (for example)!
I may have "a bit of bias".......
I've worked as a power Engineer for about 25 years, + I spent a year designing Analog Signal processing gear.
@Chris J - I see this again and again in various articles I've found online: the recommendation to use a 3:1 ratio (where the series resistor has three times the value of the parallel resistor) when designing a 2-resistor network.
Can you please tell me what happens sonically, with dynamic headphones especially (as opposed to planar magnetic), when the ratio is increased or decreased?
As previously posted, the resistor network that Jan Plummer (of TBI Audio) built for my MG3 amp uses two resistors, but their values have a ratio of 5:1.
But tens of thousands of RC hobbyists manage to use them safely, while a handful don't, unfortunately.
To be honest, the 2B-LP is not in an optimum place for headphone listening unless I want to either lay on the floor or put a chair in the middle of the "TV Room". LOL!
I really bought it to drive the rear channels in my surround sound system plus I wanted balanced inputs.
I bought my current 2BLP pro for the HT also, first for the center channel then it was moved for surround duty, but it was replaced both times with more powerful amps to par with the 4BSST running the mains plus I'm running Dynaudio all round.