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Post subject: Deluxe Reverb
Posted: Thu Dec 06, 2007 8:46 am
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I have a Deluxe Reverb that's is supposed to be '66. The original speaker has been replaced with a Jensen C12K. To my ears, the amp sounds a little muffled. Does anyone know what the original speaker was?
Thanks,
Frank


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Posted: Thu Dec 13, 2007 3:33 pm
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A Blackface Deluxe originally had Oxford 12K5-6's.


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Post subject: DR Speaker
Posted: Fri Dec 14, 2007 8:39 am
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Thank you. Since Oxford is out of business, what is a good replacement?
Frank

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Posted: Wed Dec 19, 2007 3:11 pm
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Last edited by tinker tech on Wed Jul 29, 2009 10:27 am, edited 1 time in total.

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Post subject: speaker
Posted: Mon Dec 24, 2007 8:32 am
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Thanks, Tinker. That's the kind of answer I was hoping for. I found a 25 watt Weber alnico that I have ordered. It is currently out of stock but should ship in January. I just want to let this amp breathe again. The Jensen ceramic is a little muffled sounding to me.

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Posted: Mon Feb 04, 2008 8:13 am
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Jensen speaker models denote their approximate power handling capacity and magnet type. The actual power ratings have been published in several books so I'll discuss them in general terms here.

The R, S, and T suffixes denote a low power rating: good for Princetons and Champs, but the R is barely able to handle the power of a Deluxe. The Q and P suffixes denote a medium power rating. These are especially good for multi-speaker amps up to 40-watts since multiple speakers divide the amp's total output power between them. For this reason, the P10Q is the speaker to have in the 5F6-A Bassman. Note that it does not appear that Fender used the "P" rated speakers very often. The N and LL suffixes denote a high power rating, with "high power" being a relative term. The P12N, on a good day, can handle 20 watts. It's no wonder that 80-watt Twins easily shredded a pair of them. Note that Fender did not use the "L" rated speakers (but Ampeg and Leslie did).

Oxford: Oxford speakers codes work in a similar fashion, but it is the letter that denotes power handling. The higher the letter, the higher the power rating. I found an Oxford ad in a 1960s trade magazine with the peak power ratings of some speakers: K = 25 watts, L = 30 watts, M = 40 watts, and T = 45 watts (12" speaker) or 60 watts (15" speaker). It is important to note that these are peak power ratings, not RMS power. The RMS rating is more realistic and is usually about half of the peak rating so use that as a rough guide.

The "J" rated speakers are usually found on 12-watt Princetons. The "K" rated speakers are found in reverb and non-reverb Deluxes and in multi-speaker amps up to 40-watts such as the Tremolux and Concert. The "L" rated speakers are found in reverb and non-reverb Deluxes, some Tremolux amps, and multi-speaker amps like the blackface Concert, Super Reverb and Vibrolux Reverb. The "M" rated speakers had good service life in the piggyback Bassman and Bandmaster amps, but were easily blown in blonde Twins. The "T" rated speakers were standard in Twin Reverbs, but like the Jensen C12Ns, they often had a short service life.

Many amp geeks don't like Oxford speakers found in Fender amps from 1965 through the 1970s. The gap distance was increased in the Oxfords that Fender used later in the decade and this reduced their efficiency (and they were cheaper to make this way). Again, I say let your ears be your guide. I've heard many great sounding Fender amps with Oxfords. I will admit that I prefer Jensens, but I've never let an Oxford speaker sway my decision from owning a Fender amp. Additionally, the Oxfords from early '60s generally sound very good. According to noted vintage amp specialist Gregg Hopkins, these early Oxfords were constructed similarly to Jensens from that period with respect to materials and voice coil gap. That could explain why they sound good.

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Post subject: Jensen ratings
Posted: Mon Feb 04, 2008 9:16 am
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Thanks, Mike. It's a 12S that I have on order. A friend of mine that is a studio guitarist had recommended the low ratings for the Deluxe. I will rarely, if ever, run this amp wide open so that should be about right for me. We play smaller clubs and restaurants and so far I haven't been able to go louder than 3!
Frank

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Posted: Mon Feb 04, 2008 7:19 pm
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Last edited by tinker tech on Wed Jul 29, 2009 10:27 am, edited 1 time in total.

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Post subject: Re: Jensen ratings
Posted: Wed Jul 16, 2008 10:57 am
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bigfrank wrote:
Thanks, Mike. It's a 12S that I have on order. A friend of mine that is a studio guitarist had recommended the low ratings for the Deluxe. I will rarely, if ever, run this amp wide open so that should be about right for me. We play smaller clubs and restaurants and so far I haven't been able to go louder than 3!
Frank


Frank,
What has been your experience with the Weber Alnico 12s? Good / bad? Do you know its sensitivity (dB @ 1meter)? I have just recently been looking into this particular speaker for building a 2x12 cab.
Bill


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