Features
- Designed for general purpose or replacement use in push-pull tube output circuits.
- For single ended use, see our 125SE Series.
- Frequency response: 150 Hz. - 15 Khz at full rated power (+/- 1db max. ref. 1 Khz)
- Open style with minimum 5" long primary leads.
- Secondary solder lugs for convenient secondary connections (except 125B - uses minimum 5" secondary leads).
- Primary impedances from 1,200 to 25,000 Ohms.
- Secondary impedances from 1.5 to 15 Ohms.
- For smaller sized units (but fewer impedance options) see our multiple impedance 125H Series.
Gallery
Part Details
Click Part No, below, for details (e.g., Product drawings, assembly instructions, ship weight)
Units shown: inch. Switch units to: mm
| Part No. | Audio | Max. D.C. Bias Per Side | Primary | Weight | Overall Dimensions | Mounting Hole | Quantity | Price | Buy Now | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Watts | (ma) | Inductance | (lbs.) | A | B | C | D | G | ||||
| 125A | 3 | 20 | 14.94 H | 0.19 | 2.06 | 1.25 | 1.19 | 1.75 | 0.19 | 15 | $71.311 | Buy Now |
| 125B | 5 | 35 | 8.97 H | 0.3 | 2.38 | 1.38 | 1.38 | 2.00 | 0.19 | 51 | $72.479 | Buy Now |
| 125C | 8 | 45 | 5.60 H | 0.5 | 2.81 | 1.50 | 1.69 | 2.38 | 0.19 | 136 | $74.736 | Buy Now |
| 125D | 10 | 55 | 4.48 H | 1 | 3.25 | 1.75 | 2.00 | 2.81 | 0.19 | 59 | $76.293 | Buy Now |
| 125E | 15 | 60 | 2.99 H | 1.5 | 3.69 | 2.00 | 2.31 | 3.13 | 0.19 | 52 | $82.521 | Buy Now |
Hook-Up Data
| Connect | Voice Coil Impedance (Ohms) | |||||||
|---|---|---|---|---|---|---|---|---|
| Speaker To | 1.5 | 2 | 3.2 | 4 | 6 | 8 | 12 | 15 |
| (Secondary Lugs) | Resulting Total Primary Impedance (Below), Blue Wire to Brown Wire | |||||||
| 1 & 2 | 27000 | - | - | - | - | - | - | - |
| 2 & 3 | 18000 | 24000 | - | - | - | - | - | - |
| 3 & 4 | 16500 | 22000 | - | - | - | - | - | - |
| 4 & 5 | 10000 | 13500 | 21600 | 27000 | - | - | - | - |
| 5 & 6 | 8500 | 11000 | 18000 | 22000 | - | - | - | - |
| 1 & 3 | 5400 | 7200 | 11500 | 15000 | 21600 | - | - | - |
| 2 & 4 | 4200 | 5600 | 9000 | 11200 | 16800 | 22500 | - | - |
| 3 & 5 | 3300 | 4400 | 7000 | 8800 | 13200 | 17600 | 26400 | - |
| 4 & 6 | 2400 | 3200 | 5100 | 6400 | 9600 | 12800 | 19200 | 24000 |
| 1 & 4 | 2150 | 2900 | 4600 | 5800 | 8700 | 11600 | 17400 | 21500 |
| 2 & 5 | 1550 | 2050 | 3300 | 4100 | 6150 | 8200 | 12300 | 15500 |
| 3 & 6 | 1300 | 1700 | 2700 | 3400 | 5100 | 6800 | 10200 | 12800 |
| 1 & 5 | - | 1400 | 2200 | 2800 | 4200 | 5600 | 8400 | 10200 |
| 2 & 6 | - | - | 1700 | 2100 | 3150 | 4200 | 6300 | 8000 |
| 1 & 6 | - | - | 1200 | 1500 | 2300 | 3000 | 4500 | 5600 |
Data subject to change without notice.
Tags: audio transformer, push-pull, output, phase inverter, tube output
