```python
import sounddevice as sd
import numpy as np
import wave
import os
from datetime import datetime

class AudioRecorder:
    def __init__(self, sample_rate=44100, channels=1):
        self.sample_rate = sample_rate
        self.channels = channels
        self.recording = False
        self.frames = []

    def callback(self, indata, frames, time, status):
        if self.recording:
            self.frames.append(indata.copy())

    def start_recording(self):
        self.recording = True
        self.frames = []
        self.stream = sd.InputStream(
            samplerate=self.sample_rate,
            channels=self.channels,
            callback=self.callback,
            dtype='float32'
        )
        self.stream.start()

    def stop_recording(self):
        self.recording = False
        self.stream.stop()
        self.stream.close()
        return np.concatenate(self.frames)

    def save_wav(self, filename, audio_data):
        with wave.open(filename, 'wb') as wf:
            wf.setnchannels(self.channels)
            wf.setsampwidth(2)
            wf.setframerate(self.sample_rate)
            wf.writeframes((audio_data * 32767).astype(np.int16))

    def record_and_save(self, duration=5, output_dir='recordings'):
        os.makedirs(output_dir, exist_ok=True)
        timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = os.path.join(output_dir, f"recording_{timestamp}.wav")
        
        print(f"Recording for {duration} seconds...")
        audio_data = sd.rec(int(duration * self.sample_rate), samplerate=self.sample_rate, channels=self.channels)
        sd.wait()
        
        self.save_wav(filename, audio_data)
        print(f"Saved recording to {filename}")
        return filename
```