• TalkBass has been independent since 1998. Add your voice.
    Create a free account to reply to discussions, view embedded media, and browse with fewer display ads.
    Join free Log in
    Want zero display ads or expanded classifieds tools? Compare plans.

Ampeg SVT-15T worth repairing?

#22
Sorry for my ignorance but I am now confused by all the electronics part of this. Everyone I talked to seem to caution me like in ALL CAPS the #1 thing I need to do is match the impedance and forget about worrying about Watts. So I embarked on looking for 4Ohm 15" which there are only 2 readily available from Eminence atleast.. Legend CA154 which is 300W with Xmax of 5 I think and about 97 sensitivity. DELTA 15LF-4 is the 4 Ohm version of the Delta and is 600W with Xmax of 6 but slightly less sensitivity at 95. But then I read you don't want to get an over specd speaker bc that excess Xmax etc req more power or more will got to heat vs to sound or something like that... see already don't know what I am talking about. And now sounds like I CAN go 8 Ohm? Which would then put the Beta back in play. When I look at the manual it says 100W 4Ohms (pls see pic). I think I need to understand more
Given theoretically all same price which would you go (Force I found was used so don't want to go that route)

Screenshot_20220129-172249_Drive.jpg


agedhorse said:
You are going to have to shop the speaker to get it repaired. Speaker Repair Pros is who I recommend.

You don't have to recone as 4 ohms. In fact, I would recommend 8 ohms because of a slight increase in sensitivity will minimize any difference in the amp's rated power between 4 and 8 ohms.

As a replacement speaker, the Delta 15A is fine, so is the Beta 15A more or less,, but I think the Force is a better speaker.
Click to expand...
 
#23
The minimum load the amp can drive is 4 ohms. The amp can safely drive 8 ohms and will deliver about 70 watts into 8 ohms. With the reduced power, if the sensitivity is ~1dB higher on the 8 ohm speaker, the acoustic results will be the same.

This is why I recommended the 8 ohm Delta (or Beta) if you don't want to recone your existing driver (I would recone at 8 ohms).
 
#24
WorksInTheory said:
Sorry for my ignorance but I am now confused by all the electronics part of this. Everyone I talked to seem to caution me like in ALL CAPS the #1 thing I need to do is match the impedance and forget about worrying about Watts. So I embarked on looking for 4Ohm 15" which there are only 2 readily available from Eminence atleast.. Legend CA154 which is 300W with Xmax of 5 I think and about 97 sensitivity. DELTA 15LF-4 is the 4 Ohm version of the Delta and is 600W with Xmax of 6 but slightly less sensitivity at 95. But then I read you don't want to get an over specd speaker bc that excess Xmax etc req more power or more will got to heat vs to sound or something like that... see already don't know what I am talking about. And now sounds like I CAN go 8 Ohm? Which would then put the Beta back in play. When I look at the manual it says 100W 4Ohms (pls see pic). I think I need to understand more
Given theoretically all same price which would you go (Force I found was used so don't want to go that route)

View attachment 4563224
Click to expand...

I wouldn't go with a LF version of a speaker in an amp with only one speaker. Use an LF if you have a mid-driver or horn to provide for the higher frequencies.
 
  • Like
Reactions: agedhorse
#25
Thanks @beans-on-toast, interesting so LF not a standalone. What about the Legend CA154? Do you feel that will do well as a standalone in a sealed cab (I believe this is sealed... didn't see a vent or port)

beans-on-toast said:
I wouldn't go with a LF version of a speaker in an amp with only one speaker. Use an LF if you have a mid-driver or horn to provide for the higher frequencies.
Click to expand...
 
  • Like
Reactions: beans-on-toast
#26
Also @agedhorse first thank you for all thebadvice so far.

Here's Ampegs answer to me thus the confusion too:
Hello WorksInTheory. Your Ampeg Support Ticket was updated with the following message:
Thanks for reaching out.
Here are the speaker specs to aid in locating a replacement:
15" 150 watt 4 ohms

I hope that helps!
All the best,
Hodgy
Customer Support Team
Yamaha Guitar Group, Inc.
 
#27
WorksInTheory said:
Also @agedhorse first thank you for all thebadvice so far.

Here's Ampegs answer to me thus the confusion too:
Hello WorksInTheory. Your Ampeg Support Ticket was updated with the following message:
Thanks for reaching out.
Here are the speaker specs to aid in locating a replacement:
15" 150 watt 4 ohms

I hope that helps!
All the best,
Hodgy
Customer Support Team
Yamaha Guitar Group, Inc.
Click to expand...
Yes, that is the information on the original speaker but that speaker is no longer available and you are unwilling to seek a proper recone.

The specs are really not helpful in this case because approaches and experience has changed over the years. I stand by my recommendation based on experience, you can take it for what it's worth or you are welcome to reinvent the wheel. Your choice.
 
#28
WorksInTheory said:
Thanks @beans-on-toast, interesting so LF not a standalone. What about the Legend CA154? Do you feel that will do well as a standalone in a sealed cab (I believe this is sealed... didn't see a vent or port)
Click to expand...

Yes, based on the specs it should work. I've never tried one. I have used a Delta 15A in other amps.

BTW, the schematic for the 15T is here:

[Invalid or Expired Link Removed]
 
#30
@agedhorse Just to clarify - it's not that I am unwilling - aside from distance and shipping - I have spent due diligence inquiring locally at least 3 to 4 places and waiting for response from additional others using the referrals given to me. Answers I get back are such as, and I quote, "we are not taking any services during Covid" or "the art of reconing is a lost art, we don't do that anymore". And yes I am sure there are people who are doing it that I can drive 90 miles or ship it to and maybe I should eventually consider that. I just don't want you thinking I am not listening to your advice or not acting on it when you are giving your time to comment on my post which is greatly appreciated. I am just as surprised that this hasn't been more simple.
 
#32
beans-on-toast said:
Yes, based on the specs it should work. I've never tried one. I have used a Delta 15A in other amps.

BTW, the schematic for the 15T is here:

[Invalid or Expired Link Removed]
Click to expand...

The Delta 15A is 8 ohms and 3dB greater sensitivity which makes it a better choice and one I have experience with. There should bhe a net 2dB increase in maximum SPL even though the amp is delivering only 70 watts.
 
  • Like
Reactions: beans-on-toast
#35
Yeah got response back that he's booked out due not only to backlog but Covid-related supply chain issues and to check back later when he opens up the queue again. Thanks though, good to have this one in the rolodex.

Old Fart said:
You might have to wait. Last time I asked Paul about this workload was in early November and he said he was not taking new work until the end of the year. If you can afford the time, then get in his queue. He's "The Guy," IMHO.
Click to expand...
 
#37
beans-on-toast said:
A second Delta 15A in an extension cabinet is a 4 ohm option but would get expensive.
Click to expand...
The problem is that the 4 ohm version (based on the data I have) is that the loss of efficiency is greater than the gain in power (by a significant amount too).
 
  • Like
Reactions: beans-on-toast
#38
agedhorse said:
The problem is that the 4 ohm version (based on the data I have) is that the loss of efficiency is greater than the gain in power (by a significant amount too).
Click to expand...

Somewhat offset by the increase in volume from 215's.

The Delta 15A is pretty good speaker given the price. Buy a speaker and get free shipping. Recone cost plus shipping both ways and the new speaker could be more cost effective.
 

Latest posts

Top Bottom
Back