General Characteristics
Nominal Overall Diameter 259 mm 10 in
Nominal Voice Coil Diameter 25 mm 0.98 in
Magnet Weight 200 g 7 oz
Overall Weight 1.4 kg 3.09 lbs
Flux Density 0.96 T
Voice Coil Winding Depth 8 mm 0.31 in
Magnetic Gap Depth 6 mm 0.24 in
Thiele-Small Parameters
Nominal Impedance 16Ω
Voice Coil DC Resistance RE 3.6 Ω 6.68 Ω 12.3 Ω
Resonance Frequency ƒS 99 Hz 97 Hz 99 Hz
Mechanical Q Factor QMS 23.8 14.83 23.4
Electrical Q Factor QES 1.94
Total Q Factor QTS 1.37 1.62 1.79
Mechanical Moving Mass MMS 13.7 g 15.2 g 13.4 g
Mechanical Compliance CMS 189 µm/N 177 µm/N 193 µm/N
Force Factor BxL 4.6 Wb/m 5.83 Wb/m 7.27 Wb/m
Equivalent Acoustic Volume VAS 29 lt. 27.4 lt. 29.5 lt.
Maximum Linear Displacement XMAX ± 0.8 mm ± 0.8 mm ± 0.75 mm
Reference Efficiency nO 1.85 % 1.7 % 1.43 %
Diaphragm Area SD 330 cm2 330.1 cm2 330 cm2
Losses Electrical Resistance RES 59.2 Ω 102 Ω 149 Ω
Voice Coil Inductance @ 1kHz LE 0.35 mH 0.54 mH 0.75 mH
Constructive Characteristics
Magnet Alnico
Voice Coil Winding Copper
Voice Coil Former Kapton
Cone Material Paper
Surround Material Integrated Paper
Dust Dome Material Felt
Basket Material Pressed Sheet Steel
Surround Treatment No
Electrical Characteristics
Nominal Impedance 16Ω
Rated Power 25 W 25 W 25 W
Musical Power 50 W 50 W 50 W
Sensitivity@1W,1m 95.1 dB 94.2 dB 94.7 dB
25 watts
Available in 4Ω, 8Ω, 16Ω

The P10R is very important in the history of Jensen speakers. Its shimmering, yet throaty and vibrant tone is one of the signatures of the Tweed era and inspired the start-up of the British tones. It was the first speaker reissued by Jensen, presented to a restricted panel of partners at the 1999 Summer NAMM show. The P10R is the speaker that contributed to the magical tone of the 4x10 Bassman® Tweed amps, the 4x10 Super Tweed Amps and the equally mythical 3x10 Bandmaster® amps.

Guitarist Description
Rich, warm tone. Accentuates the higher frequencies in sparkling detail.
Specification Sheet
Product Dimensions
Note: all dimensions are in mm.
User Reviews
This is a great speaker for a 5F1 Champ. I built a 5F1 with a slightly bigger cabinet to accommodate a 10" speaker. The P10R does an excellent job: clear and clean but still round and warm. For such a small cabinet I am impressed with the amount of bass response - I did not expect that from a 10" speaker in such a small cabinet. There are lots of comments on the internet stating that the modern Jensens sound shrill and brittle but I did not experience any of that. Quite the contrary: warm, round and with a pleasant old school vibe is how this P10R sounds in my little Champ! In spite of the relatively low sensitivity, the amps is also surprising loud, which I ascribe to the good mid-response of the speaker, which gives it a good audible voice.
I used for a long time 12 inch speakers, Jensen as well as Celestion. Jensen stays my favorite speaker. Celestions sound muddy around the 160 -200Hz, and this is not the case with Jensens speaker. I use mostly the Alnico P10R only for the typical Alnico sound. When I tried the C10R , I very surprised how good they sound. Bass notes are much cleaner with 10" speakers. Now , Celestions are collecting dust. Jensens for ever.
Maraia C

Bought these to replace the four tired CTS 137-735 speakers in a '67 Fender Blackface Super Reverb amp that was recapped in 2007. These new Jensens sound very close to the CTS speakers and will only get better after break-in! Have experience with these P10Rs in three other amps and they sure didn't disappoint...very happy!

Peter Christiansen

I compared these new Jensen P10R's to some vintage 1959 P10R's I had in my Fender tweed amp collection (Deluxes) We A & B'd them against the vintage P10R's and they sound IDENTICAL to the 1959 Jensen P10Rs!! Just what I wanted, good high end without sounding thin or harsh and a big tight bottom that only alnico can deliver...just an amazing speaker!! I put a set in my blackface 1965 Super Reverb and they sound incredible. Thanks Jensen!!


I built a deluxe reverb 2x10 combo and loaded a mix of the Jensen P10Q and the P10R together. All I can say is WOW... That has got to be the best combination of alnico speakers I have ever heard in my life!


I bought a pair of P10R's for a friend's Vibrolux as payment for a drill press I bought from him, I liked the sound so I bought a pair to go with my Fender Vibrosonic and my Peavey Delta Blues 210 and they sound great.

Pierre in Eau Claire, WI

I purchased 4 P10Rs to put in a custom cab I built to reproduce a Bassman sound. I used some 40 year old pine I had in the garage and modeled it after my 59 Fender Pro. The sound quality is superb and just what I was looking for and the final cost was very reasonable. I'm thinking about building a 1 x 12 cab next.

Michael in Medford, OR

I am pleased to say that my choice of a Jensen P10R and a P12R Alnico speaker return the 44 year old Gibson GA-30RVT to its formal glory. The Jensen Vintage speakers give a very rich and warm sound, exactly what I was looking for, Thank You!

Lefty in New Hampshire

I am currently using two P10R alnico speakers in my 1971 silverface Fender Super Reverb. The Jensen speakers deliver the bright vintage tone I had been looking for. Thanks, Jensen Speakers

Geoffrey in Sacramento, CA

I’ve modified a 1971 Bogen 10watt class A tube PA amp, now I’m putting the cabinet together. The thing sounds great with the P10R. I love the sound, the speaker is definitely what I wanted for this. I play an Electric mandolin, this is a big improvement.

Chris in Williamsville, New York

I am collecting parts to build a Fender Bassman clone and will use P10Rs - they are my favorite speaker.