IQ 5180 AT

Data

General

• Manufacturer: I.Q
• Model: 5180 AT
• Years of manufacture: 1987-1989
• Manufactured in: Essen/Germany
• Colour: oak P43, oak white, oak black, oak grey, mahogany, others against surcharge
• Dimensions: 335 x 1233 x 352 (W x H x D)
• Weight: 41 kg
• Original price approx.: 5.000,- DM (UVP pair)

Technical Data

• Type: 4-way TL resonator floorstanding speaker
• Chassis:
  • Low-mid: 250 mm (Vifa M25WO-39-08).
  • mid-bass: Vifa M21WJ-49-08

Midrange: 75 mm dome (Vifa D75MX-30-08)

• • tweeter: 25 mm dome tweeter, SEAS 25 TAFC/D H0537 (no longer available)
    • possible replacement domes: SEAS 27 TFF (H 831) or

   MONACOR DT-254 (inner diameter of cabinet has to be reworked) 
   mounting diameter: 85 mm

• power handling (nominal/music): 150/250 Watt

efficiency:

• Frequency response: 22 - 24,000 Hz.
• Transient response: (for LS with multiple drivers).
• Impedance: 4 Ohm

Technical Data Tweeter

• Original tweeter SEAS 25 TAFC/D H0537

Outer diameter: 110 mm

• • Mounting diameter: 74.8 mm
  • Mounting depth (incl. front): 41.5 mm
  • Front panel thickness: 3.6 mm
  • Impedance: 8 Ohm

Sound pressure: 90 dB SPL

• • Frequency range: 2-25 kHz
  • Resonant frequency: 1200 Hz
  • Rated power: 90 W (IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER: 3000 Hz 12 dB/oct.)

Max. Power handling (short time)220 W (IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER: 3000 Hz 12 dB/oct.)

• • DC resistance: 4.8 Ohm
  • Voice coil inductance: 0.05 mH
  • Linear excursion Xmax: 0.5 mm
  • Magnet diameter: 74.8 mm
  • Effective diaphragm area: 7.0 qcm
  • Air gap height: 2.0 mm
  • Flux density: 1.8 T
  • Force factor (F/I): 3.5 N/A

voice coil diameter: 26 mm voice coil height: 1.5 mm

• • Moving mass incl. air load: 0.33 g
  • Diaphragm Material: Aluminum
  • Magnet weight: 0.25 Kg
  • Total weight: 0,50 Kg
    • Source: SEAS Fabrikker AS, Norway

• possible replacement dome: SEAS 27 TFF (H 831) (differences in grease)
  • outer diameter: 110 mm
  • mounting diameter: 74.8 mm
  • Mounting depth (incl. front): 27.5 mm
  • Front panel thickness: 3.5 mm
  • Impedance: 6 Ohm
  • Sound pressure: 92 dB SPL
  • Frequency range: 2-25 kHz
  • Resonant frequency: 1200 Hz
  • Rated power: 90 W (IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER: 2500 Hz 12 dB/oct.)

Max. Power handling (short time)220 W (IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER: 2500 Hz 12 dB/oct.)

• • DC resistance: 4.8 Ohm
  • Voice coil inductance: 0.05 mH
  • Linear excursion Xmax: 0.5 mm
  • Magnet diameter: 73.0 mm
  • Effective diaphragm area: 7.5 qcm
  • Air gap height: 2.0 mm
  • Flux density: 1.8 T
  • Force factor (F/I): 3.5 N/A
  • Voice coil diameter: 26 mm

voice coil height: 1.5 mm

• • Moving mass incl. air load: 0.30 g
  • Diaphragm material: fabric diaphragm
  • Magnet weight: 0,25 Kg
  • Total weight: 0,50 Kg
  • Cost: approx. 40,00 Euro
    • Source: SEAS Fabrikker AS, Norway

Special equipment

• list here

Pictures

• IQ 5180 AT without cover .JPG
• IQ 5180 AT with cover.JPG

Remarks

Other models in the same series:

• 2140 AT
• 2160 AT
• 3140 AT
• 4180 AT
• 5180 AT

Reports

audio 10/1987

Upper class 3 ears

Total points 63