FAQ  •  Register   •  Gallery •  Login

It is currently Wed Dec 17, 2014 9:27 pm

TFM 45 Questions

<<

gjm76

Newbie 50+

Posts: 50

Joined: Thu Apr 10, 2008 6:45 am

Location: Cleveland, Ohio

Post Wed Jan 19, 2011 5:00 pm

TFM 45 Questions

Guys,
Just got 2 TFM 45's from eBay and had a couple questions...

-When you bridge the 45 to run mono, does just one meter work? In my TFM 35, both meters go when bridged, but this is a very different amplifier, so not sure. Also, the manual is confusing as it says the RIGHT RED is POS and the RIGHT LEFT is NEG, but the picture they show, shows the absolute opposite, so can someone help me out here?

-Is it safe to run a 4 ohm center speaker (PSB 6c) mono on the tfm 45. I know you are never supposed to run mono on 4 ohms, but with a center does it matter. Would there be any negative to just running one channel and not the other? I know it will NEVER use all 375 watts on a center speaker in a normal sized room.

Anyone who has worked on these amps, please email me, Would love to replace the caps, set bias, etc, but not sure how...

gjm76@cox.net


Thanks!
Attachments
DSC00819.JPG
DSC00819.JPG (1.28 MiB) Viewed 416 times
Check out my new website for Vintage Audio Advertisements, Brochures, and Reviews! http://www.VINTAGEAUDIOARCHIVE.com

Theater System: Carver tfm-35, tfm-25, M-500t, 490t CD, Denon 2808 DVD, Sony 550 Blu Ray, Elite Receiver, Denon Dp-62 TT, Epson HC 6100 Projo, Gateway XP PC

Bar System: Carver m1.5t, Otari mx-5050 Open Reel, Sony Turntable, HP Desktop PC
<<

jjptkd

User avatar

SILVER-7 TUBE AMP

Posts: 2902

Joined: Wed Sep 22, 2010 4:50 pm

Location: Snohomish, WA

Post Wed Jan 19, 2011 5:09 pm

Re: TFM 45 Questions

Nice looking amps!! I think only one meter is supposed to work in bridged mode as it seems I've had the same experiance. I'm sure others here will chime in and help out, good luck!
Sunfire TGP-III
Sunfire 405x5
PS Audio DL-III DAC
Klipsch Chorus II's
Klipsch RSW 15
Klipsch KW-120 (2)
<<

kingman

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 5768

Joined: Sun Nov 30, 2008 2:10 pm

Location: Upstate South Carolina

Post Wed Jan 19, 2011 6:40 pm

Re: TFM 45 Questions

I bridged a 55 and both meters worked???? Rainman is the forum expert on the 45...Mikey????
In reality, it only matters what it sounds like to YOU!!!
<<

gjm76

Newbie 50+

Posts: 50

Joined: Thu Apr 10, 2008 6:45 am

Location: Cleveland, Ohio

Post Sun Jan 23, 2011 12:15 pm

Re: TFM 45 Questions

Thanks for that info, Does anyone else know much about the 45? Hoping to get more info about working on them...
Check out my new website for Vintage Audio Advertisements, Brochures, and Reviews! http://www.VINTAGEAUDIOARCHIVE.com

Theater System: Carver tfm-35, tfm-25, M-500t, 490t CD, Denon 2808 DVD, Sony 550 Blu Ray, Elite Receiver, Denon Dp-62 TT, Epson HC 6100 Projo, Gateway XP PC

Bar System: Carver m1.5t, Otari mx-5050 Open Reel, Sony Turntable, HP Desktop PC
<<

elgrau

SILVER-7 TUBE AMP

Posts: 2899

Joined: Wed May 31, 2006 9:33 pm

Post Sun Jan 23, 2011 1:20 pm

Re: TFM 45 Questions

Main thing (IMO) about the 45 (assuming it's working) is to make sure that the service "damping adjustment" on both channels is properly set. Otherwise this amp can sound like ass, instead of its intended very musical, very clear "tubelike" sound... Is a post here (somewhere) that details how to do this adjustment (which requires a signal generator and these instructions include how to download the Virtual Testbench software version of a signal generator and how to use it for this adjustment...). Especially important if your 45's don't have the service bulletin "fix" that prevents these adjustments from "drifting" off their proper values.
Family room: 400 disk changer with PS Audio Digital Link III DAC; Technics SL-1100A TT. QED Quenx1 IC's from DAC & TT to Adcom GTP-602 preamp/Tuner. AudioQuest King Cobra IC's from preamp to M1.0t mk-II opt2. QED Silver Spirals 4M wires to EPI 1000’s.
Living room: AudioQuest Black Mamba 8M IC's from family room preamp to Barcus-Berry 2002R Sonic Maximizer to GlowPower Zyxt IC's to Sunfire 300x2 to Nordost 6M bi-source wires to AOS 28" MDF spherical speakers using six 8" woofers and eight 1" dome tweeters symm. arranged around the surface.
SS system: CX-995V DVD to AV-705x 5 channel amp (center/rears) & M1.0t mk-II opt2(fronts).
Garage: TLM-3600 CDP to MXR150 Receiver (pre) to TFM-42 to EPI 400 speakers.
<<

Rainman

User avatar

SILVER-7t

Posts: 1023

Joined: Fri May 09, 2008 2:19 am

Post Wed Jan 26, 2011 2:08 am

Re: TFM 45 Questions

I have never bridged the 45 and would not want to so I can't answer your question from personal experience. I will look in the service and owners manuals for the 45 and see if the answer is in either manual. I do have a question for you.. Why in the world would you want to run two 45's bridged?

Rainman
Question: Do you know why turds are tapered on the ends? Answer: So your asshole doesn't slam shut..

Carver- SDA490t, SDA450, 2 TFM45's, TFM15, CT23, CT28v, CT27v, Linn Kaber speakers, Sunfire crm2's, PS Audio Statement speaker cables and I/C's, A.P.C. power
<<

frankieD

Frankie The Mouth

Posts: 2471

Joined: Fri Mar 16, 2007 2:38 pm

Location: So Cal

Post Wed Jan 26, 2011 11:24 am

Re: TFM 45 Questions

[quote="Rainman"][color=#0000FF] I have never bridged the 45 and would not want to so I can't answer your question from personal experience. I will look in the service and owners manuals for the 45 and see if the answer is in either manual. I do have a question for you.. Why in the world would you want to run two 45's bridged? Rainman quote]




Mike I'm surprised that you with your background in auto racing would ask such a question.

Obviously the answer is:


MORE POWER !
:lol: :lol: :lol: :lol: :lol: :lol: :lol:
<<

jjptkd

User avatar

SILVER-7 TUBE AMP

Posts: 2902

Joined: Wed Sep 22, 2010 4:50 pm

Location: Snohomish, WA

Post Wed Jan 26, 2011 11:47 am

Re: TFM 45 Questions

I've never bridged a 45 but I did bridge a 42 (same thing, different meters) and it seems to me only the left meter worked but that was a long time ago. I had bought an SW-15 Klipsch subwoofer and the amp plate didn't work so I wired in a bypass so I could power it with an external amplifier. At first I tried powering it with only one channel (375 watts) thinking that should've been enough power but I was pretty disappointed. Then I bridged it (1,000 watts) and look out! It was a whole new animal. Suddenly I had too much power at my finger tips and had to be very careful not to blow the thing up, it was great.
Sunfire TGP-III
Sunfire 405x5
PS Audio DL-III DAC
Klipsch Chorus II's
Klipsch RSW 15
Klipsch KW-120 (2)
<<

Rainman

User avatar

SILVER-7t

Posts: 1023

Joined: Fri May 09, 2008 2:19 am

Post Wed Jan 26, 2011 8:30 pm

Re: TFM 45 Questions

Since bridging has been the topic there is something which has not been mentioned... When bridging for more power there is a penalty for power gained which is paid as a sound quality loss. The amount of sound quality lost varies greatly depending on the amplifier being bridged. With an amplifier such as the tfm 45 the personality of the amplifier can also change. The change can range from barely noticeable to highly annoying depending on what the amp is running as well as the other components in the system such as how revealing your speakers may or may not be. Personally I would not run a bridged amplifier in our home gear for these reasons. I also have a rule (not a guideline) when it comes to car audio which is- I will only run bridged amps to subs, try to avoid it when possible on mid bass, and never to mids/highs. This is one of those things that is done or not done by each persons needs and personal choice. With some peoples systems any penalty paid for power gained may not even be audible so it may work for them, whereas other systems will show you the penalty in a big way.... And by the way Frankie, more power can be a good thing as long as your more powerful engine will live for the entire race distance... :-k

Rainman
Question: Do you know why turds are tapered on the ends? Answer: So your asshole doesn't slam shut..

Carver- SDA490t, SDA450, 2 TFM45's, TFM15, CT23, CT28v, CT27v, Linn Kaber speakers, Sunfire crm2's, PS Audio Statement speaker cables and I/C's, A.P.C. power
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13372

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Wed Jan 26, 2011 8:48 pm

Re: TFM 45 Questions

^^^^What he said--
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
<<

kingman

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 5768

Joined: Sun Nov 30, 2008 2:10 pm

Location: Upstate South Carolina

Post Wed Jan 26, 2011 9:02 pm

Re: TFM 45 Questions

As I said ^^^^^^
In reality, it only matters what it sounds like to YOU!!!
<<

Scarabeo

User avatar

SILVER-7 TUBE AMP

Posts: 2658

Joined: Tue Nov 18, 2008 6:05 pm

Post Thu Jan 27, 2011 12:01 am

Re: TFM 45 Questions

As they said <-------
BillD, You will be forever with us! RIP until we meet again on the other side...
<<

OconeeOrange

SILVER-7 TUBE AMP

Posts: 4490

Joined: Sat Mar 28, 2009 6:24 pm

Post Thu Jan 27, 2011 12:33 am

Re: TFM 45 Questions

Hell, I don't even understand what they said , but ^^^^^^^^^^ I agree.

Return to Carver Home (Audio)

Who is online

Users browsing this forum: No registered users and 2 guests

Powered by phpBB © 2011 phpBB Group.