PTT5.25M08-NAA-05
5.25" Ultra Low Distortion Midrange with inverted aluminium dustcap
Description
The 5.25” midrange driver has been optimized for midrange use and achieves higher sensitivity as compared to the X version of the PTT5.25 product family. It incorporates the easily recognizable PURIFI NeutralSurround suspension and ultra-linear motor system PURIFI PureDrive technology resulting in astounding performance with ultra clean distortion specifications.
The PTT5.25M08-NAA-05 features:
- Vibroacoustic optimized cone and dust cap in black anodized aluminum
- Negligible Force Factor Modulation (FFM) and Surround Radiation Distortion (SRD)
- Ultra Low Magnetic Hysteresis Distortion (MHD)
- Dedicated midrange driver with enhanced efficiency
- Designed and manufactured in Denmark
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Specifications
| General Specifications | |
|---|---|
| Type | Midrange |
| Size | 5.25in |
| Nominal impedance | 8Ω |
| Cone material | Black Anodized Aluminum |
| Linear excursion, Xlin | ±2.9mm |
| Maximum mechanical excursion, Xmax | ±14.0mm |
| Motor efficiency factor, Beta | 14.3 (N*A)^2/Ω |
| Efficiency Bandwidth Product, EBP | 141.4Hz |
| Long term maximum power | 200W |
| Rated noise power, 100h | 70W |
| Powertest crossover | 2nd order high pass Butterworth @ 200Hz |
| Electrical & Acoustical Parameter | |
|---|---|
| DC resistance | 6.3Ω |
| Minimum impedance above resonance, Zmin | 6.9Ω |
| Frequency for minimum impedance, fmin | 410Hz |
| Maximum impedance, Zo | 139Ω |
| Voice Coil inductance @ 1kHz 0mm, Le | 0.35mH |
| SPL @ 2.83Vrms/1m, 1000-2800Hz | 85.2dB |
| SPL @ 1W/1m, 1000-2800Hz | 84.6dB |
| Thiele/Small Paramters | |
|---|---|
| Resonance frequency, fs | 41Hz |
| Mechanical Q factor, Qms | 6.3 |
| Electrical Q factor, Qes | 0.30 |
| Total Q factor, Qts | 0.29 |
| Equivalent volume, Vas | 9.4L |
| Effective piston area, Sd | 84.9cm2 |
| Effective piston diameter, D | 10.4cm |
| Force factor, Bl | 9.5N/A |
| Mechanical resistance, Rms | 0.68kg/s |
| Moving mass, Mms | 16.8g |
| Suspension compliance, Cms | 0.92mm/N |
| Typical Box Tunings | |
|---|---|
| Typical corner frequency, sealed B2 alignment | 100.0Hz |
| Box volume, sealed B2 alignment | 1.9L |
| Voice Coil Properties | |
|---|---|
| Voice Coil diameter | 39mm |
| Voice Coil length | 9.8mm |
| Voice Coil layers | 4 |
| Airgap height | 4.0mm |
| Winding material | CCAW |
| Physical Dimensions | |
|---|---|
| Basket diameter | 147mm |
| Cutout diameter | 121mm |
| Mounting hole pattern diameter | 138mm |
| Mounting hole diameter | 4.2mm |
| Magnet diameter | 100mm |
| Outer flange height | 3.6mm |
| Build-in depth | 75.0mm |
| Weight | 1.75kg |
| Internal volume displacement | 0.30L |