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Is the t 20 a different driver?
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Hmmm. Curiouser and curiouser, wonder why no mad dog T20 mods then? This may require me dealing off some Senni's to fund a T20 experiment. Time to cruise the Thievesbay methinks.
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Because the T50 is the most expensive, and thus the "best".
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I know that some people in here have achieved seriously good results with modding the new T20 ,almost , if not completely indistinguishable from the modded T50 results .
They can check in here I'm not going to put them on the spot, or you can ask in the T50 Incremental Mods thread about that
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Originally Posted by
nick n /img/forum/go_quote.gif
ask in here for sure, I betcha you'll get some reassurance.
http://www.head-fi.org/t/618659/fostex-t50rp-incremental-mods-and-measurements
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I don't see any differences between the T20-40-50RP series except for the damping:[/size]
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1. T50RP = Stiff black felt over the internal lower cup vents allows limited venting [/size]
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A plastic cap seals the central headband screw compartment[/size]
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2. T40RP mk II = A rectangle of plastic seals the internal lower cup vents allows no venting[/size]
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A plastic cap covers the central headband screw compartment but has a ~ 4 mm hole in the center[/size]
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3. T20RP mk II = A more "open" or porous plastic grid material over the internal lower cup vents allows for more venting than T50RP[/size]
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No cap over the central headband screw compartment[/size]
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So, Damping/Resistance from greatest to least: T40RP mk II > T50RP > T20RP mk II[/size]
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Equivalent SQ and FR is possible from all three with a few simple modifications to compensate for different damping schemes/resistance from model to model. You could try these reversible additions to your preferred mod configuration:[/size]
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1. For T40RP mk II + Cover the hole in the central headband screw compartment cap with tape [/size]
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Remove the plastic rectangle covering the internal lower cup vents[/size]
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Use rubber cement to secure a rectangle of craft felt over the lower internal cup vents.[/size]
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2. For T20RP mk II + Cover the central headband screw compartment with tape[/size]
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[size=12.727272033691406px] Cover the plastic mesh overlaying the internal cup vents with thin craft felt[/size][/size]
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I wonder if the power rating (2 watts vs 3 watts) has to do with the differences in damping schemes/resistance of the 3 "different" models? But wait. T20/40RP mk II are rated at 2 watts. T20RP mk II has porous mesh over the vents and no cap vs T40RP mk II has sealed vents and a 4 mm hole in the cap vs T50RP has semi-porous felt over the vents and sealed caps. Could the cap configuration be partially responsible for the power ratings??[/size]
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BTW, a couple of months ago the price difference between T20RP mk II and T50RP was ~$50.00. Now it's only $10 --> $89.00 for T20/40RP mk II and $99.00 for T50RP.[/size]
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Also, just noticed that T20RP mk II and T40RP mk II now have cushioned headbands. There was no mention of this for T50RP at bhphotovideo.[/size]
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T20RP mk II:[/size]
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Type | Circum-aural, semi-open |
Frequency Range | 20 Hz - 30 kHz |
Impedance | 50 ohms |
Sensitivity | 96dB SPL/mW |
Maximum Input Power | 200 mW |
Connectors | 1/4" TRS phone |
Cable Length | 10' (3 m) |
Weight | 11.6 oz (328.9 g) |
T40RP mk II:
[size=1.15em]Specifications
Type | Circum-aural, semi-open |
Frequency Range | 20Hz to 25kHz |
Impedance | 50 ohms |
Sensitivity | 93dB SPL/mW |
Maximum Input Power | 200 mW |
Connectors | 1/4" TRS phone |
Cable Length | 10' (3 m) |
Weight | 11.6 oz (328.9 g) |
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T50RP:
[size=1.15em]Specifications
Type | Circumaural Semi-Open RP Dynamic Stereo Headphones |
Frequency Range | 15 Hz - 35 kHz |
Impedance | 50 Ohm |
Sensitivity | 98 dB/mW |
Maximum Input Power | 3000 mW |
Connectors | Detachable 1/4" Stereo Phone Plug
1/8" Stereo Mini Plug |
Cable Length | 10' (3 m) |
Weight | 11.6 oz (330 g) |
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